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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).

### 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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## The fossil record clearly shows that ________. the fossil record clearly shows that ________. large complex organisms evolved long before simple. nearly all species that have existed in the past still exist today. all species evolve from pre-existing species. new species appear suddenly and fully differentiated, without an ancestral species. several different species can hybridize to produce a single new species

### Answered by answersmine AT 22/10/2019 – 02:35 AM

I think the answer is all species evolve from pre-existing species. This was based on Charles Darwin’s Theory of Evolution which he learned during his expeditions.He identified that some fossils have similarities with other existing animals, in which he believed were a part of adaptation in order to survive.

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## The company also discovered that it costs \$29. to produce 2 widgets, \$115 to produce 4 widgets, and \$757 to produce 10 find the total cost of producing 2 widgets

The company also discovered that it costs \$29. to produce 2 widgets, \$115 to produce 4 widgets, and \$757 to produce 10 find the total cost of producing 2 widgets

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## Magine that a chromosome contains the following chromosome order: ZYXWVUT. What type of mutation happens to produce ZYXWWVUT?

Magine that a chromosome contains the following chromosome order: ZYXWVUT. What type of mutation happens to produce ZYXWWVUT?

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## Research conducted on what happens when atoms get excited has helped in the identification of the atoms in the universe. What happens when atoms get excited? Atoms change into a particular shape. Atoms lose subatomic particles. Atoms produce a particular odor. Atoms release a particular color of light..

### Answered by answersmine AT 22/10/2019 – 02:54 AM

I believe the correct answer is the last option. When atoms get excited, atoms would release a particular color of light. When atoms gets excited, the electrons would move from a lower level to a higher level. However, this state is only short-lived and happens only in a split second then it goes back to its original level immediately. Going back to the lower level would release some extra amount of energy which is being released as heat or, oftentimes, as light in the form of electromagnetic energy or the particle photons. Thus, it releases a specific color of light depending on the wavelength of the light.

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## 1. productivity a craftsperson 2. tariff ability to read and write 3. literacy a tax on imported goods 4. artisan producing or tending to produce goods and services having exchange value

1. productivity: producing or tending to produce goods and services having exchange value

2. tariff: a tax on imported goods

3. literacy: ability to read and write

4. artisan: a craftsperson

Explanation:

Productivity is the state or quality of producing something, particularly crops.

Tariff refers to a tax or duty paid on a particular kinds of imports and exports.

Literacy is the capacity to read and write.

An artisan is a skillful buying and selling worker, especially one whose job involves making things by hand.

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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.

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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## I NEEED HELP PLEASEEEEEE I WILL RATE BRAINLIEST!!!!!!!!!!!! Select the properly written and balanced equation for the following chemical reaction: Aqueous solutions of sodium hydroxide and iron (III) nitrate react to produce a precipitate of iron (III) hydroxide in an aqueous solution of sodium nitrate. ——-3NaOH (aq) + Fe(NO3)3 (aq) Fe(OH)3 (s) + 3NaNO3 (aq) NaOH (aq) + FeNO3 (aq) FeOH (s) + NaNO3 (aq) NaOH (aq) + Fe(NO3)3 (aq) FeOH3 (s) + NaNO3 (aq) 3NaOH (aq) + FeNO3 (aq) FeOH (s) + 3NaNO3 (aq) I believe that it is the first choice but I am not sure….

I NEEED HELP PLEASEEEEEE I WILL RATE BRAINLIEST!!!!!!!!!!!! Select the properly written and balanced equation for the following chemical reaction: Aqueous solutions of sodium hydroxide and iron (III) nitrate react to produce a precipitate of iron (III) hydroxide in an aqueous solution of sodium nitrate. ——-3NaOH (aq) + Fe(NO3)3 (aq) Fe(OH)3 (s) + 3NaNO3 (aq) NaOH (aq) + FeNO3 (aq) FeOH (s) + NaNO3 (aq) NaOH (aq) + Fe(NO3)3 (aq) FeOH3 (s) + NaNO3 (aq) 3NaOH (aq) + FeNO3 (aq) FeOH (s) + 3NaNO3 (aq) I believe that it is the first choice but I am not sure….

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## The quote below was part of a campaign speech given by Senator Albert J. Beveridge in 1898: “But today we are raising more than we can consume. Today we are making more than we can use. Today our industrial society is congested; there are more workers than there is work; there is more capital than there is investment. We do not need more money—we need more circulation, more employment. Therefore, we must find new markets for our produce, new occupation for our capital, new work for our labor.” Which type of policy was this statement intended to justify?

The correct answer is imperialism.

Imperialism is when one country tries to extend its power over another country or territory. This can be done through warfare or the signing of treaties/agreements. The quote by Beveridge is discussing how American society is producing more goods than its ever produced and that the US needs to expand its power and influence over other countries. This would allow the excess goods and services to be sold to new consumers, generating more profits for business owners.

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## I WILL RATE BRAINLIEST! NEED HELP!!!! Barium hydroxide (Ba(OH)2) and sulfuric acid (H2SO4) react to produce water and barium sulfate (BaSO4). Write and balance the equation. ——-Ba(OH)2 + H2SO4 2H2O + BaSO4 2BaOH + H2SO4 H2O + Ba2SO4 BaOH + H2SO4 2OH + BaSO4 2Ba(OH)2 + H2SO4 H2O + Ba2SO4 I think it is the first one but I am unsure….

I WILL RATE BRAINLIEST! NEED HELP!!!! Barium hydroxide (Ba(OH)2) and sulfuric acid (H2SO4) react to produce water and barium sulfate (BaSO4). Write and balance the equation. ——-Ba(OH)2 + H2SO4 2H2O + BaSO4 2BaOH + H2SO4 H2O + Ba2SO4 BaOH + H2SO4 2OH + BaSO4 2Ba(OH)2 + H2SO4 H2O + Ba2SO4 I think it is the first one but I am unsure….

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## When might an organism rely on fermentation to produce the energy it needs? In situations where oxygen is no longer available Never because it will not produce the oxygen needed Only when oxygen supplies are in abundance When the Krebs cycle will not produce the energy needed

When might an organism rely on fermentation to produce the energy it needs? In situations where oxygen is no longer available Never because it will not produce the oxygen needed Only when oxygen supplies are in abundance When the Krebs cycle will not produce the energy needed

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## Photo necessities produces camera cases. they have found that the cost c(x) of making x camera cases is a quadratic function in terms of x. a company discover that it cost 27 dollars to produce 2 camera cases, 105 dollars to produce 4 camera cases, and 675 dollars to produce 10 camera cases. find the total cost of producing 5 camera cases

We will use
c(x)=ax²+bx+c
sub the points given

when x=2, c(x)=27
27=a(2)²+b(2)+c or
27=4a+2b+c

when x=4, c(x)=105
105=a(4)²+b(4)+c
105=16a+4b+c

when x=10, c(x)=675
675=a(10)²+b(10)+c
675=100a+10b+c

so we gots
27=4a+2b+c
105=16a+4b+c
675=100a+10b+c

eliminate c’s from everybody
multiply first equation by -1 and add to 2nd and 3rd equation
the resulting 2nd and 3rd equations are shown below
78=12a+2b
648=96a+8b
multiply top equation by -4 and add to bottom

-312=-48a-8b
648=96a+8b +
336=48a+0b

336=48a
divide both sides by 48
7=a
sub back

78=12a+2b
78=12(7)+2b
78=84+2b
-6=2b
-3=b
sub back

27=4a+2b+c
27=4(7)+2(-3)+c
27=28-6+c
27=22+c
5=c

c(x)=7x²-3x+5 is da equation
to produce 5 we do
c(5)=7(5)²-3(5)+5
c(5)=7(25)-15+5
c(5)=175-10
c(5)=165

costs \$165 to make 5 camera cases

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## CAN YOU PLEASE HELP ME WITH THIS PROBLEM? This is due by MIDNIGHT 2). Manufacturer A produces hammers that are normally distributed with a mean weight of 4.6 lb and a standard deviation of 0.8 lb. Manufacturer B produces hammers that are normally distributed with a mean weight of 6.3 lb and a standard deviation of 1.4 lb. (a) What percentage of Manufacturer A’s hammers will weigh less than 5 lb? (b) What percentage of Manufacturer B’s hammers will weigh less than 5 lb? (c) Which manufacturer is more likely to produce a hammer weighing exactly 5.2 lb? Explain.

Part (a)
Manufacturer A;
Mean, μ = 4.6
Std. deviation, σ = 0.8

For the random variable x = 5, the z-score is
z = (x – μ)/σ = (5 – 4.6)/0.8 = 0.5
From standard tables,
P(x<5) = P(z<0.5) = 0.69 = 69%

69% will weigh less than 5 lb.

Part b)
Manufacturer B
μ = 6.3
σ = 1.4

For x = 5, z = (5 – 6.3)/1.4 = -0.9286
From standard tables,
P(x<5) = P(z<-0.9286) = 0.1766 = 17.7%

About 18% will weigh less than 5 lb.

Part (c)
x = 5.2 lb

Manufacturer A:
z = (5.2-4.6)/0.8 =  0.75
From tables,
P(x=5.2) = 0.773 = 77.3%

Manufacturer B:
z = (5.2-6.3)/1.4 = -0.7857
P(x=5.2) = 0.216 = 21.6%

Manufacturer A is more likely to produce a 5.2 lb hammer because its probability is higher.

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## How does cellular respiration explain why animals breathe rapidly when they are running? Energy is used up while running, and cellular respiration needs oxygen to produce more energy. Energy is used up while running, and cellular respiration needs carbon dioxide to produce more energy. Glucose is used up while running, and cellular respiration needs oxygen to make glucose. Glucose is used up while running, and cellular respiration needs carbon dioxide to make glucose.

Answer is: Energy is used up while running, and cellular respiration needs oxygen to produce more energy.

Cellular respiration creates an energy molecule when glucose is broken down.

Balanced chemical reaction for cellular respiration (convert biochemical energy):

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy, or:

glucose + oxygen → carbon dioxide + water + energy .

Carbon dioxide and water are released during cellular respiration.

This reaction is exothermic (energy is released).

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## According to the definition of profit, if a profit-maximizing firm will always attempt to produce its desired level of output at the lowest possible cost, then it will

### Answered by answersmine AT 22/10/2019 – 04:27 AM

If a profit maximizing company firm will always attempt to produce its desired level of output at the lowest possible cost, then it will TAKE A LONG RUN PERSPECTIVE ON COSTS WHEN SUCH COST CAN NOT BE ADJUSTED. Profit maximization refers to the strategies which companies use to increase their profits. A profit maximizing company usually try its possible to produce efficiently at the lowest possible costs, this is the principal goal of the company and it determine the manner in which the company manage costs.

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## Compared to alcohol, __________ are often more likely to produce dizziness and confusion before significant loss of physical coordination.

In tropical rain forest, the animals will have to deal with higher temperatures and greater rainfall. One example of an adaptation they might need is a thin, water-proof coat. This will prevent heat from becoming trapped inside their fur/hair/feathers, and the water-absorbing coating will allow water to stick to the inside of the coat without being absorbed, where the water will absorb the heat instead of themselves, and will cool the through evaporative cooling (heat release through evaporation)

In a deciduous forest, there is much colder temperatures, and significantly less rainfall. These animals would likely want a thicker water-proof coat. This is because the thicker coat would allow heat to become trapped, keeping them warm in the winter, and the water-proof coating prevents water from freezing in their fur, making them colder.

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## Which of the following best describes a species? a group of closely related organisms that can produce viable or fertile offspring a group of closely related organisms that can NOT produce viable/fertile offspring a group of closely related organisms that cannot produce any offspring a group of distantly related organisms that can produce infertile offspring

Which of the following best describes a species? a group of closely related organisms that can produce viable or fertile offspring a group of closely related organisms that can NOT produce viable/fertile offspring a group of closely related organisms that cannot produce any offspring a group of distantly related organisms that can produce infertile offspring

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## Lymph nodes produce what substance that assists in immunity from disease?

The right answer is Transgenic organisms can produce a desired product that may benefit other organisms.

A transgenic organism contains DNA combining  stably integrated in all its cells. In other words, the organism, be it a plant, an animal or a microorganism, has a new piece of DNA embedded in it. a chromosome in each of its cells. This “new piece” of DNA usually contains a gene from another organism (plant, animal or other) that has been modified to be expressed in the new  organization. A transgenic organism may even possess the DNA of another organism of the same species. The inserted gene can be called the transgene.

Currently, diabetics are treated by injecting insulin from either a healthy human donor or cultures of genetically modified (transgenic) bacteria that secrete the protein.

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## Why did king henry viii of england want an annulment or divorce from catherine of aragon? catherine was the daughter of king ferdinand and queen isabella of spain, who would not share their american colonies. the swiss thinker john calvin influenced henry to find a protestant wife. he wanted to start a protestant church in england, but catherine was catholic. he wanted to remarry because catherine did not produce a male heir to the throne?

The Reformation actually started after Columbus’s landing in North America.

Treaty of Tordesillas in 1494 was forced on Spain and Portugal by the Pope. The Pope basically said that all lands in the New World belonged to Spain and all new non-Christian lands in the Eastern Hemisphere belong to Portugal. No other Catholic countries can do anything in those areas without the approval of the owner.

The pope basically drew two lines on the globe setting the border. The western line started at the north pole cut half way through Greenland and ended at the south pole. The new world was everything to the west. Problem is that it ran through a chunk of Brazil which is why Brazil is an ex-Portuguese colony.

The Eastern line starts at the North Pole runs through siberia, through the pacific just west of Japan, and cuts Australia in half. Of course, Australia hadn’t been discovered yet. Everything to the the east of this line is the new world.

Obviously, this treaty didn’t hold up well, but the reformation gave the protestant countries an excuse to explore the new world since they didn’t have to take orders from the Pope. Even so, France, a catholic country, ignored it too.

Really, the only country that was effected by the reformation in the exploration of the Americas was England. All the other countries, changed their religion once and then went to war with the nearest catholic country. Sweden became Lutheran and stayed that way. The Dutch Republic became Calvinists and stayed that way.

England kept switching. First it was Catholic. Then, Henry VIII made it protestant. Then, Henry’s daughter Mary I made it catholic again. Henry’s other daughter Elizabeth I (with the two hit movies) made it Protestant again.

Years latter, Oliver Cromwell over through the monarchy, executed the King Charles I, and established a Protestant fundamentalist religious military dictatorship. He outlawed drinking,smoking, gambling, theater, dirty books, sports, prostitution, and anything generally fun. He would have made Saudi Arabia proud. Basically, all you could do is work, pray, and die. Sex was allowed for creating children, but you couldn’t enjoy it.

When Cromwell died, the people of England said enough was enough and brought back the King. Charles II kicked out the fundamentalists and brought back drinking, smoking, gambling, dirty books, sports, prostitution, and having fun during sex. Incidentally, those were also all his hobbies.

This brings us to the famous Pilgrims. They were part of Cromwell’s crowd. They kept agitating a return to the no-fun policy. They annoyed everybody. They weren’t persecuted for practicing their religion, they were persecuted because they kept trying to force their religion on everyone else. Sort of like Southern Baptists.

Charles II was the most easy going monarch in British history. Do realize how annoying you have to be to get him to throw you out.

Charles’s brother James II was obsessed with turning Great Britain catholic again. After four years of trying, they kicked him and his followers out.

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## Optimization problem:A manufacturer determines that x employees on a certain production line will produce y units per month where . To obtain the maximum monthly production, how many employees should be assigned to the production line?**It is NOT sufficient to find an answer that you think is a max or a min without testing for relative extrema. You MUST test relative extrema at all times by using either the first or second derivative test even if you only have one critical value/point.

Cal problem!

given production
P(x)=75x^2-0.2x^4

To find relative extrema, we need to find P'(x) and solve for P'(x)=0.

P'(x)=150x-0.8x^3    [by the power rule]

Setting P'(x)=0 and solve for extrema.
150x-0.8x^3=0  =>
x(150-0.8x^2)=0 =>
0.8x(187.5-x^2)=0
0.8x(5sqrt(15/2)-x)(5sqrt(15/2)+x)=0
=>
x={0,+5sqrt(15/2), -5sqrt(15/2)}   by the zero product rule.
[note: eqation P'(x)=0 can also be solved by the quadratic formula]

Reject negative root because we cannot hire negative persons.

So possible extrema are x={0,5sqrt(15/2)}

To find out which are relative maxima, we use the second derivative test.  Calculate P”(x), again by the power rule,
P”(x)=-1.6x
For a relative maximum, P”(x)<0, so
P”(0)=0  which is not <0  [in fact, it is an inflection point]
P”(5sqrt(15/2))=-8sqrt(15/2) < 0, therefore x=5sqrt(15/2) is a relative maximum.

However, 5sqrt(15/2)=13.693 persons, which is impossible, so we hire either 13 or 14, but which one?

Let’s go back to P(x) and find that
P(13)=6962.8
P(14)=7016.8

So we say that assigning 14 employees will give a maximum output.

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## Which is an example of how the peripheral nervous system helps the body maintain its internal environment? Muscles produce keratin so that hair can grow stronger. Sweat glands break down the food that is consumed. Muscles contract rapidly to produce heat on a cold day. The brain recalls information to help take a test.

The integumentary system covers the surface of the body is true about the integumentry system.

Explanation:

The integumentary system includes the skin, nails, glands, hairs, and nerves. Its main role is to act as a barrier to protect the body from the outside environment. It also retains body fluids, regulates body temperature, eliminates waste products, and protects against disease.

The integumentary system is the largest organ in the body that covers the surface of the body.

Thus, The integumentary system covers the surface of the body is the true statement about the integumentry system.

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## Suppose you have monohybrid flowers in your garden and find that they produce black seeds to brown seeds in the ratio of 3:1. If the allele are designated (B & b) receptively, what are the probable genotypes of the black seeds produced by your plants?

Suppose you have monohybrid flowers in your garden and find that they produce black seeds to brown seeds in the ratio of 3:1. If the allele are designated (B & b) receptively, what are the probable genotypes of the black seeds produced by your plants?

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## Which of the following occurs during photosynthesis? A. CO2 is used to produce water B. CO2 is absorbed by mitochondria C. CO2 and H2O are converted to carbohydrates D. CO2 and H20 are combined into carbonic acid

The correct answer is a. Amy: wildlife in or near water = turtles, crayfish, goldfish non-water wildlife = fox, deer, bobcat.

Explanation:

According to the question students were asked to contrast their observations based on the location so according to the location, animals should be differentiated into water animals and land animals.

So turtles, crayfish, goldfish are the wildlife found in or near the water and fox, deer, bobcat are non-water animals according to their location. Therefore the correct answer is a. Amy: wildlife in or near water = turtles, crayfish, goldfish non-water wildlife = fox, deer, bobcat.

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## What scale factor(s) will produce an image that is larger than the original? I. 0.86 II. 116% III. 9 over 5

Option C – BD=76 cm

Step-by-step explanation:

Given : You are designing a diamond-shaped kite. you know that AD = 44.8 cm, DC = 72 cm, and AC = 84.8 cm.

To find : How long BD should it be?

Solution :

First we draw a rough diagram.

The given sides were AD = 44.8 cm, DC = 72 cm and AC = 84.8 cm.

According to properties of kite

Two disjoint pairs of consecutive sides are congruent.

DC=BC=72 cm

The diagonals are perpendicular.

So, AC ⊥ BD

Let O be the point where diagonal intersect let let the partition be x and y.

AC= AO+OC

AC=   …….[1]

Perpendicular bisect the diagonal BD into equal parts let it be z.

BD=BO+OD

BD=z+z

Applying Pythagorean theorem in ΔAOD

where H=AD=44.8 ,P= AO=x , B=OD=z

………[2]

Applying Pythagorean theorem in ΔCOD

where H=DC=72 ,P= OC=y , B=OD=z

…………[3]

Subtract [2] and [3]

……….[4]

Add equation [1] and [4], to get values of x and y

Substitute x in [1]

Substitute value of x in equation [2], to get z

We know, BD=z+z

BD= 38.06+38.06

BD= 76.12

Nearest to whole number BD=76 cm

Therefore, Option c – BD=76 cm is correct.