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Brainly.com What is your question? High School Mathematics 5+3 pts Which of the following situations could be represented with the given system of equations? 0.1x+0.6y=0.4(5) x+y=5 A. Eunice needs to combine solutions of 0.1M HCl and 0.4M HCl to produce 5L of 0.6M hydrochloric acid (HCl). B. Eunice needs to combine solutions of 0.1M HCl and 0.6M HCl to produce 5L of 0.4M hydrochloric acid (HCl). C. Eunice needs to combine solutions of 0.4M HCl and 0.6M HCl to produce 5L of 0.1M hydrochloric acid (HCl). D. Eunice needs to combine solutions of 0.1M HCl and 0.6M HCl to produce 4L of 0.5M hydrochloric acid (HCl).

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Answered by answersmine AT 22/10/2019 – 02:26 AM

In the equations, the molarity is given as coefficients, x and y are volumes of HCl of different concentrations.  Therefore on the right hand side, molarity is 0.4, volume is 5 L.
The correct answer has a product of 0.4M and 5L.

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If nitrogen and hydrogen combine in a synthesis reaction, what would the product of the reaction be?

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If nitrogen and hydrogen combine in a synthesis reaction, what would the product of the reaction be?

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Read the passage. (1) Most Americans know that “Uncle Sam” is a nickname for the United States; however, few Americans know how the name originated. (2) Some historians believe the name comes from a nineteenth-century businessman from New York. (3) His real name was Samuel Wilson. (4) His neighbors called him Uncle Sam. (5) During the War of 1812, he won a government contract. (6) He was to supply beef to U.S. soldiers. (7) The beef was packed in barrels labeled “U.S.” to show that they belonged to the U.S. government. (8) Soldiers from New York saw the barrels. (9) They jokingly said “U.S.” stood for Uncle Sam. (10) The joke spread. (11) Soon, soldiers began using the nickname Uncle Sam to refer to the United States. (12) Civilians also began using the nickname Uncle Sam to refer to the United States. (13) In 1961, Congress passed a resolution. (14) The resolution recognized Samuel Wilson as the original Uncle Sam. Which is the most effective way to combine sentences (5) and (6)? During the War of 1812, he won a government contract he was to supply beef to U.S. soldiers. During the War of 1812, to supply beef to U.S. soldiers was what he won a government contract for. During the War of 1812, he won a government contract to supply beef to U.S. soldiers.

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Answer:

During the War of 1812, he won a government contract to supply beef to U.S. soldiers.

Explanation:

One of the uses of the preposition “to” is to work as an infinitive of purpose, this makes a focus on the objective or purpose of a sentence in the next sentence. So in the first part of the sentece, we have a statement of the situation(he won a contract), in the second part we have the purpose (of the contract) merged by “to” (with the purpose of):.

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Which statement best describes the use of catalytic converters in automobiles? A. They decrease the rate of the reactions that produce harmful gases. B. They oxidize hydrocarbons to form less toxic gases. C. They combine the larger hydrocarbon molecules with smaller ones. D. They increase reaction temperature for cleaner burning.

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Answer:  B. They oxidize hydrocarbons to form less toxic gases.

Explanation:

A catalytic converter is a device which is used in automobile engine to convert the harmful gaseous exhaust into a less toxic pollutant after the process of combustion of the fuel. It conducts an internal redox (oxidation-reduction) reaction in the automobile engine to facilitate such conversion.

On the basis of the above information, They oxidize hydrocarbons to form less toxic gases is the correct option.

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White gold is an alloy that typically contains 45.0% by mass gold and the remainder is platinum. if 154 g of gold are available, how many grams of platinum are required to combine with the gold to form this alloy?

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Percent by mass of platinum in white gold = 100% – 45% = 55%

We let x be the mass of the white which is 45% gold and 55% platinum. 

Mass of gold in white gold = m x 0.45

where m is the total mass.

From the given above, we formulate the equation that would allow us to determine the mass of white gold.
                            154 = x (0.45)
                                     x = 342.22 g

Then, we determine the amount of platinum.
                     mass of platinum = (342.22 g)(0.55)
                      mass of platinum = 188.22 grams

Thus, 188.22 grams of platinum is needed. 

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If 1 g of hydrogen combines completely with 8 g of oxygen to form water, how many grams of hydrogen does it take to combine completely with 64 g of oxygen?

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The balanced chemical reaction would be:

2H2 + O2 = 2H2O

We are given the amount of oxygen to react with hydrogen. To determine the amount of hydrogen needed for the oxygen to completely react, we use the balanced reaction to relate the substances. We do as follows:

64 g O2 ( 1 mol / 32 g ) ( 2 mol H2 / 1 mol O2 ) ( 2.02 g / 1 mol ) = 8.08 g of hydrogen gas needed

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– How many moles of NaHCO3 can be produced from 125 mol of NaCl – How many moles Of H2O are produced when 6 mol of O2 is consumed in burning methyl alcohol, CH3OH, according to the following equation? – Solutions of iron(III) chloride, FeCl3, are used in photoengraving and to make ink. This compound can be made by the following reaction. a. How many moles of FeCl3 form from 31 mol of Cl2? b. How many moles of Fe are needed to combine with 5 mol of Cl2 by this reaction? c. If 0.62 mol of Fe is to be used by this reaction, how many moles of FeCl3 form? – Ammonia is produced synthetically by the reaction: a. Is this an exothermic or endothermic process? b. How many moles of NH3 are formed when 1 mol of N2 reacts with hydrogen? c. If 18 x 1023 molecules of H2 react with nitrogen, how many moles of NH3 are produced?

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A positive cahnge of enthalpy, ΔH rxn = + 55 kJ/mol, for the forward reaction means that the reaction is endothermic, i.e. the reactants absorb energy and the products are higher in energy.

Activation energy is the difference in the energy level of the reactants and the peak in the potential energy diagram (the energy of the transition state).

For an endothermic reaction, the products will be closer in energy to the transition state than what the reactans will be; so, the activation energy of the reversed reaction is lower than the activation energy of the forward reaction.

Activation energy of reverse and forward reactions is related by:

Activation energy of reverse rxn = Activation energy of forward rxn – ΔH rxn

=> Activiation energy of reverse rxn = 102 kJ/mol – 55 kJ/mol = 47 kJ/mol

Answer: 47 kJ/mol

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Read the passage. (1) The umbrella dates back more than 3,000 years to Mesopotamia. (2) That ancient land was located in the Middle East. (3) The Middle East is a hot and sunny part of the world. (4) Royalty there demanded protection from the sun. (5) People developed the umbrella for this purpose. (6) Use of the umbrella as a sunshade then spread to ancient Europe. (7) In fact, if you analyze the origin of the word umbrella,you will see that it reflects the umbrella’s original purpose. (8) Umbrella comes from the Latin word umbra. (9) Umbra means “shade.” (10) Eventually, the Romans used the umbrella to protect themselves from the rain. (11) They used the umbrella to protect themselves from the sun as well. (12) Today, umbrellas are used mainly as raingear. Which is the most effective way to combine sentences 4 and 5? Royalty there demanded protection from the sun, and people developed the umbrella for this purpose. People developed the umbrella for this purpose, royalty having had demanded protection from the sun. People developed the umbrella for the purpose of protection from the sun, which royalty demanded. Royalty there, demanding protection from the sun, so people developed the umbrella for this purpose.

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Hey there!

Correct answer is D. Comma or Period Inside Rule

A. Question mark or exclamation point inside: those are not really necessary.

B. Colon or semicolon: not, a semicolon would divide the whole sentence and it would be shorten; a colon would work but after requested, when there is already a comma.

C. Question mark or Exclamation Point Outside Rule: would not work, becase it is an very polite and affirmative sentence.

D: A comma or period inside rule: actually, just a comma would work. Please, Cooper’s dad requested, go… Cooper’s dad requested must be in between commas as it is a vocative.

Hope this helps

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Simplify -3p – 2m + 8p – 7m What are the like terms? Show work here (combine like terms): Answer:

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Simplify -3p – 2m + 8p – 7m What are the like terms? Show work here (combine like terms): Answer:

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Radioactive decay occurs when two nuclei are smashed into each other and combine to form a much larger nucleus and release a vast amount of energy. True False

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The balanced chemical reaction is as shown below,

                 N₂ + 3H₂  –> 2NH₃

The equation shows that every 3 moles of hydrogen, H2, there would be 2 moles of ammonia, NH3, that is going to be formed. Using this concept, we solve for the unknown in this item. 

Since we are restricted only of the number of hydrogen, it becomes our limiting reactant. 

          (6 moles H2) x (2 moles NH3/3 moles H2) = 4 moles NH3

Therefore, given enough amount of N2, the amount of NH3 that can be formed out of the 6 moles of H2 is equal to 4 moles. 

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Combine fractions 5b/4a+b/3a-3b/a

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Combine fractions 5b/4a+b/3a-3b/a

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Simplify 9-2(x+6) Show work here (Distribute -2, then combine like terms): Final Answer

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Employee                                 Mary      Zoe         Greg         Ann           Tom

Cumulative Pay                       $6,800   $10,500  $8,400    $66,000   $4,700

Pay subject to FICA S.S.         $421.60  $651.00  $520.80 $4092.00 $291.40
6.2%, (First $118,000)

Pay subject to FICA Medicare $98.60 $152.25    $121.80    $957.00    $68.15
1.45% of gross

Pay subject to FUTA Taxes      $40.80  $63.00     $50.40    $396.00  $28.20
0.6%

Pay subject to SUTA Taxes   $367.20  $567.00  $453.60  $3564.00 $253.80
5.4% (First $7000)

Totals                                     $928.20 $1,433.25 $1,146.60 $9,009.00 $641.55

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Simplify -8y + 4(11y – 3) Show work here (Distribute 4, then combine like terms): Final Answer

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Answer:

3 hours.          

Step-by-step explanation:

Let x be the time taken by shoe repairman to repair one pair.

We have been given that his assistant, who takes twice as long to repair a pair of shoes. So time taken by his assistant to repair one pair of shoes would be 2x.

The number of pair of shoes repaired by repairman in one hour would be frac{1}{x}.

The number of pair of shoes repaired by assistant in one hour would be frac{1}{2x}.

We have been given that together they can fix 16 pairs of shoes in an eight-hour day. We can represent this information in an equation as:

frac{1}{x}+frac{1}{2x}=frac{8}{16}

frac{1}{x}+frac{1}{2x}=frac{1}{2}

Let us have a common denominator.

frac{2*1}{2*x}+frac{1}{2x}=frac{1}{2}

frac{2}{2x}+frac{1}{2x}=frac{1}{2}

frac{2+1}{2x}=frac{1}{2}

frac{3}{2x}=frac{1}{2}  

Upon cross multiplying our equation we will get,

2x*1=3*2

2x=3*2

frac{2x}{2}=frac{3*2}{2}

x=3

Therefore, it take 3 hours for the repairman to fix one pair of shoes by himself.

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If you combine 240.0 mL of water at 25.00 °C and 120.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.

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The equation for how temperature changes the resistance R is: 

R=R₀(1+α(T-T₀)), where R₀ is the resistance at T₀=20°C, T is the temperature for which we want to calculate the resistance and α is the temperature coefficient for resistance. 

The resistance of the copper wire increases by 18% or by 0.18, so the new value for the resistance is R=1.18*R₀.

T₀=20°C
=0.0068
R=1.18*R₀

Now we need to input that into the equation for resistance change and solve for temperature T.  

1.18R₀=R₀(1+α(T-20)), R₀ cancels out,

1.18=1+α(T-20),

1.18-1=α(T-20), we divide by α,

0.18/α=T-20, we put 20 on the left side,

26.47+20=T

T=46.47°C

So the temperature on which the resistance of copper wire will increase by 18% is T=46.47°C. 

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Combine and simplify the following radical expression. 2 over 3 times cubed root of 5

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Answer:  The correct option is (C). 10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared

Step-by-step explanation:  Given that the segment AB has point A located at (8, 9). The distance from A to B is 10 units.

We are to select the correct option that could be used to calculate the coordinates for point B.

Let, (x, y) be the co-ordinates of point B.

According to distance formula, the distance between two points (a, b) and (c, d) is given by

d=sqrt{(c-a)^2+(d-b)^2}.

Therefore, the distance between the points A(8, 9) and B(x, y) is given by

d=sqrt{(x-8)^2+(y-9)^2}.

Since, distance between A and B is 10 units, so

d = 10.

Therefore,

10=sqrt{(x-8)^2+(y-9)^2}.

Thus, the correct statement is

10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared.

Option (C) is correct.

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How does the structure of hemoglobin allow it to combine with oxygen?

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Answer: The correct answer is- D. The shape and folded structure of a protein molecule are important in determining its function.

Proteins are the most diverse group of biologically essential organic molecules that are considered to be significant for life. The basic monomeric unit of protein is amino acid whose sequence affects the function of the protein.

Biologically active form of proteins is their three dimensional structure ( native and active form) that is produced by the folding of protein molecule after it gets synthesized.

Therefore, shape and folded structure of a protein molecule are important in determining its function.

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Fertilization occurs when the chromosomes of gametes combine. True False

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The right answer is False (its the vision).

Drowsiness is a symptom that results in a strong desire to sleep. It is normal, “physiological”, when it occurs in the evening or at the usual bedtime, or in the early hours of the afternoon. If it occurs during the day, we talk about daytime sleepiness. While drowsiness can affect everyone, especially when tired, after a bad night or just after a big meal, it becomes abnormal when it is repeated daily, alters attention and interferes with daily activities.

Signs of sleepiness are:

• tiredness, want to sleep, feeling weak

• vertigo (head that “turns”)

• vision disorders (blurred vision, poor appreciation of distances, difficulties to see when night falls …)

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Which is the best way to combine the sentences to form one sentence with a compound predicate? I rode the ski lift. I skied down the mountain. A.I rode the ski lift, I skied down the mountain. B.I rode the ski lift and skied down the mountain. C.I rode the ski lift, and I skied down the mountain.

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to make ourselves as free, happy, and famous as men, whereas now we live and [die], as if we were produced from beasts, rather than from men; for men are happy, and we women are miserable, they possess all the ease, rest, pleasure, wealth, power, and fame, whereas women are restless with labour, easeless with pain, melancholy for want of pleasures, helpless for want of power, and [die] in oblivion, for want of fame; I would say this sums up the ideas presented in this passage that how oppressed women are by many men and that women generally don’t enjoy all the privileges that men enjoy as the ones who have positions of power in society.

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A transverse and longitudinal wave combine to form ______. Plz hurry and help with give brainliest

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The correct answer is B. Part of speech

Explanation:

A dictionary entry is the section of a dictionary that contains the information related to a word including its definition and other elements such as the correct pronunciation, the type of word it is, the origin of the word and in some cases the translation of this word in other language and an example or part of speech in which the word is used. From these sections the ones that might help someone to know how to use a word are the section that tells the reader which type of word it is (verb, adjective, noun, preposition, etc) and the part of speech in which the reader finds an example in which the word is being used in a grammatically correct way. Thus, if  Taylor is trying to find how to use the word “subsidy” the section or part in which Taylor can find this information is the part of speech, because this section includes an example of the use of the word Taylor can read to understand how the word is used and probably create other phrases that include the word “subsidy”.

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When the hydronium and hydroxide ions combine, what forms?

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When the hydronium and hydroxide ions combine, what forms?
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Identify factors that affect the ratio when substances combine to form compounds

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Answer : The correct option is, Lipid.

Explanation :

Carbohydrate : It is the most common type of organic compound. It contain only carbon (C), hydrogen (H), and oxygen (O) atoms.

It is built of small repeating units that form bonds with each other to make a larger

molecule. It is a long chain. It is also used for energy storage in living things.

Generally, all the carbohydrates are soluble in in water.

Lipid : Lipids are organic compounds which contain carbon, hydrogen, and oxygen atoms. It consist of fatty

acids, with or without additional molecules. Fatty acids are the organic molecules that have the general

formula CH_3(CH_2)_nCOOH, where ‘n’ ranges from 2 to 28 and always an even number. It is a long chain.

All the lipids are insoluble in polar solvent like water but are soluble in non-polar solvents. It is also used for energy storage in living things.

Monosaccharide : It is defined as the small repeating units (monomers). A monosaccharide contains carbon, hydrogen, and oxygen.

The general formula for a monosaccharide is, (CH_2O)_n, where n can be any number greater than two. For

example, if n is 6, then the formula can be written as, C_6H_{12}O_6. This is the formula of glucose. It is soluble in water.

Protein : It is an organic compound which contain carbon, hydrogen, oxygen, nitrogen, and in some

cases sulfur. They are made up of small molecules called amino acids.

All the structures are shown below.

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Crates of oranges are normally sold full. There are four partially full crates of oranges that could be combined to make a full crate. The crates are 5/8, 7/8, 3/8 and 5/8 full. If you combine the partial crates, how many additional full crates of oranges can be sold?

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So hmm let’s take a peek at the cost first

so, they chartered the plane for 150 folks with a fixed cost of 250,000
now, incidental fees are 300 per person, if we use the quantity “x”, for how many folks, then if “x” persons are booked, then incidental fees are 300x

so, more than likely an insurance agency is charging them 300x for coverage

anyway, thus the cost C(x) = 250,000 + 300x

now, the Revenue R(x), is simple is jut price * quantity

well, the price, thus far we know is 5000 for 80 folks, but it can be lowered by 30 to get one more person, thus increasing profits

so… let’s see what the price say y(x) is  bf begin{array}{ccllll}
quantity(x)&price(y)\
-----&-----\
80&5000\
81&4970\
82&4940\
83&4910
end{array}\\
-----------------------------\\

bf begin{array}{lllll}
&x_1&y_1&x_2&y_2\
%   (a,b)
&({{ 80}}quad ,&{{ 5000}})quad 
%   (c,d)
&({{ 83}}quad ,&{{ 4910}})
end{array}
\quad \\
% slope  = m
slope = {{ m}}= cfrac{rise}{run} implies 
cfrac{{{ y_2}}-{{ y_1}}}{{{ x_2}}-{{ x_1}}}implies cfrac{-90}{3}implies -30
\ quad \\
% point-slope intercept
y-{{ 5000}}={{ -30}}(x-{{ 80}})implies y=-30x+2400+5000\
left.qquad   right. uparrow\
textit{point-slope form}
\\\
y=-30x+7400

so.. now we know y(x) = -30x+7400

now, Revenue is just price * quantity
the price y(x) is -30x+7400, the quantity is “x”

that simply means R(x) = -30x²+7400x

now, for the profit P(x)

the profit is simple, that is just incoming revenue minus costs, whatever is left, is profit
so P(x) = R(x) – C(x)

P(x) = (7400x – 30x²) – (250,000+300x)

P(x) = -30x² + 7100x – 250,000

now, where does it get maximized? namely, where’s the maximum for P(x)?

well bf cfrac{dp}{dx}=-60x+7100

and as you can see, if you zero out the derivative, there’s only 1 critical point, run a first-derivative test on it, to see if its a maximum

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If a p-wave and s-wave combine? A- they can produce an L wave. B- they cancel out each other. C- the P wave disappears and the only the S Wave is left.D- the S Wave disappears and only the P wave is left.

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If a p-wave and s-wave combine? A- they can produce an L wave. B- they cancel out each other. C- the P wave disappears and the only the S Wave is left.D- the S Wave disappears and only the P wave is left.
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Which strategies can be used to solve this problem? The car assembly line workers at a new factory painted 5,000 cars in its first year, 7,213 cars in its second year, and 8,201 cars during its third year. How many more cars did the workers paint in its first and second years together than in its third year? Choose all answers that are correct. A. Draw a diagram. Draw three circles. In one write 5,000, in another write 7,213, and in the third write 8,201. Draw an x through the circle with 8,201 written in it. Circle the other two circles with a larger circle. B. Translate into an equation. (5,000 + 7,213) – 8,201 = c C. Work backward. Add 5,000 (cars painted first year) to 7,213 (cars painted in second year). Add 8,201 (cars painted in third year). D. Use logical reasoning. Combine the totals for cars painted in the first two years (5,000 + 7,213). Subtract 8,201 (cars painted in the third year) from the sum to get the answer.

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Answer with explanation:

1. Scatter plot : In Scatter plot, which consist of two variables, are represented in two dimensional plane through dots.If you join these points along the order in which they are given , you can’t predict whether they are in ascending or descending order.But if you arrange the data in ascending order and then plot it on two dimensional plane, you will get numerical data in ascending order.

2. Line Graph: A line graph is representation of something over a period of time. Suppose an object is not moving uniformly, we plot distance traveled in different interval of time in two dimensional coordinate plane.As Distance traveled is always positive , with increase in time , distance traveled will increase or remain constant , for two duration or period. So, we can say with conformity that Line graph is also one of the simplest way of representation of numerical data in ascending order.

3. Box-and-whisker plot: In Box and whisker plot, when data is arranged in ascending order, then a box is drawn, the upper and lower ends of box are first Quartile and third Quartile Respectively.Median lies inside the box.The spanning of whole box tells about Interquartile range.And the two line segments which are connected from the two ends of box ,one end of segment is lowest value in Data set and Other end of segment is largest observation in the data set.In Box and whisker Plot, Numerical data is also arranged in ascending order.

4. Stem and Leaf Plot: In Stem and Leaf plot, data is splitted into parts, the first digit of number from left is stem and last digit from right is Leaf.

For, example 45,46,47,……

4 is Stem and 5,6,7 are Leaves.

So, the way of representation of numerical data, is simplest in stem and leaf plot.

Option D:Stem- and- Leaf Plot , is simplest method to represent numerical data in ascending order.

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Combine like terms 3a – 1 + 7a + 6 =

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Combine like terms 3a – 1 + 7a + 6 =
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