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Which expression represents the algebraic phrase “nine times a number plus thirteen”? A. 9 – y + 13 B. 9 + y – 13 C. 9y + 13 D. 13y + 9


Answer:  The correct option is (C) 9y + 13.

Step-by-step explanation:  We are given to select the expression that represents the following statement :

“nine times a number plus thirteen”

Let the number be represented by y.

Then, nine times the number is written as follows :

9times y=9y.

Since we are to add 13, so the final expression is given by

E=9y+13.

Thus, the required expression is 9y+13.

Option (C) is CORRECT.

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Bill bought a new cellular phone. His monthly bill will be $34.99 each month which includes 100 minutes of use. Additional minutes will cost $0.23 per minute. Write an equation that represents the cost of the bill C in terms of m, which is the number of minutes used ABOVE the 100 that are included in the base price. a. C = 34.99(m – 100) + 0.23 c. C = 0.23m b. C = 0.23m + 34.99 d. C = 0.23(m – 100) + 34.99


Answer:

d. C = 0.23(m – 100) + 34.99

Step-by-step explanation:

Let C = X + Y, where

C = Cost of the bill in terms of m

X = First term of the equation

Y = Second term of the equation

X = add additional minutes to $ 0.23 minus the 100 minutes of use allocated.

X = 0.23 (m – 100)

Y = Base price monthly will be $ 34.99

Y = 34.99

C = X + Y

C = 0.23 (m – 100) + 34.99

Note: The only possible answer is 0.23 (m – 100) + 34.99, but we must assume that “m” is greater than or equal to 100, that is, Bill consumes at least his 100 minutes assigned by the base price.

Hope this helps!

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Henry’s little brother has $8$ identical stickers and $4$ identical sheets of paper. how many ways are there for him to put all of the stickers on the sheets of paper, if only the number of stickers on each sheet matters?


The easiest way to visualize
and answer this is to list all possible combinations or arrangements on the 4 sheets of paper.

Take note that the arrangement is as following:

# of stickers on sheet 1 – # of stickers on sheet 2 – # of stickers on sheet 3 – # of stickers on sheet 4

8 – 0 – 0 – 0

7 – 1 – 0 – 0

6 – 2 – 0 – 0

6 – 1 – 1 – 0

5 – 3 – 0 – 0

5 – 2 – 1 – 0

5 – 1 – 1 – 1

4 – 4 – 0 – 0

4 – 3 – 1 – 0

4 – 2 – 2 – 0

4 – 2 – 1 – 1

3 – 3 – 2 – 0

3 – 3 – 1 – 1

3 – 2 – 2 – 1

2 – 2 – 2 – 2

Therefore there are a total
combinations of 15 arrangements of stickers on sheets of paper.

 

 

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The data set shown below represents the number of times some families went out for dinner the previous week. 4, 2, 2, 0, 1, 6, 3, 2, 5, 1, 2, 4, 0, 1 Create a dot plot to represent the data. What can you conclude about the dot plot of the data set? Check all that apply. The range of the number line should be 0 to 7 to represent the frequency. Four families said they ate out twice the previous week. One family said they ate out 5 times the previous week. The data set is symmetrical. The median best represents the data set.


Answer:

The correct options are:

  • Four families said they ate out twice the previous week.
  • One family said they ate out 5 times the previous week.
  • The median best represents the data set.

Step-by-step explanation:

We are given a data set as:

4, 2, 2, 0, 1, 6, 3, 2, 5, 1, 2, 4, 0, 1

On arranging this data set in the frequency table we get:

Number of times they went for dinner    Number of families  

           0                                                          2

           1                                                           3

           2                                                          4

           3                                                           1

           4                                                           2

           5                                                           1

           6                                                            1

  • Hence, the range of the number line is between 0 to 6.
  • Also there are 4 dots above 2.

    Hence,  Four families said they ate out twice the previous week.

  • Also there is one dot above 5.

        Hence,  One family said they ate out 5 times the previous week.

  • The data set is not symmetrical since the median is 2 and the data points to the left and to the right do not have symmetry.

Hence, the data set is not symmetrical.

  • Also we know that the median of the data is the central tendency of the data and always best represents the data.

Hence, The median best represents the data set.

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Which of the following statements is false? The number of chromosomes is different in different organisms. There are more genes in a cell than there are chromosomes. A single gene can only influence a single trait. The karyotypes for a male human and a female human look different.



Which of the following statements is false? The number of chromosomes is different in different organisms. There are more genes in a cell than there are chromosomes. A single gene can only influence a single trait. The karyotypes for a male human and a female human look different.

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Which describes meiosis? doubles the number of chromosomes reduces the number of chromosomes by one-fourth reduces the number of chromosomes by half triples the number of chromosomes



Which describes meiosis? doubles the number of chromosomes reduces the number of chromosomes by one-fourth reduces the number of chromosomes by half triples the number of chromosomes

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E. solid copper sulfide and silver nitrate react to form copper (ii) nitrate and solid silver sulfide. write a balanced chemical equation that describes the reaction. identify the oxidation number of each element in the reaction. (you do not need to include the total contribution of charge.) is this reaction a redox reaction or a non-redox reaction? explain your answer.


Answer:

The given reaction is not a redox reaction.

Explanation:

Redox reaction is defined as chemical reaction in oxidation and reduction reactions occurs simultaneously.

Oxidation reaction is defined as the reaction in which an atom looses its electrons. Here, oxidation state of the atom increases.

Reduction reaction is defined as the reaction in which an atom gains electrons. Here, oxidation state of the atom decreases.

Solid copper sulfide when immersed in silver nitrate solution it reacts to form silver sulfide precipitate and copper(II) nitrate solution.

CuS(s)+2AgNO_3(aq)rightarrow Cu(NO_3)_2(aq)+Ag_2S(s)

Oxidation states of elements on reactant side:

Oxidation state of copper  = +2

Oxidation state of sulfur = -2

Oxidation number of silver  +1

Oxidation number of nitrogen = +5

Oxidation number of oxygen = -2

Oxidation states of elements on product side:

Oxidation state of copper  = +2

Oxidation state of sulfur = -2

Oxidation number of silver  +1

Oxidation number of nitrogen = +5

Oxidation number of oxygen = -2

No change in oxidation states of elements is observed which means that the given reaction is not a redox reaction.

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Greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5mph. which best describes the measured number



Greg is in a bike race. at mile marker four (out of ten), his speed was measured at 13.5mph. which best describes the measured number

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If you add the digits in a two-digit number and multiply the sum by 7, you get the original number. If you reverse the digits in the two-digit number, the new number is 18 more than the sum of its two digits. What is the original number? 42


The digits are x and y

multiply sum of digits by 7
7(x+y) you get the original number which would be 10x+y
so
7x+7y=10x+y

if reverse digits, new number is18 more than sum
10y+x=18+x+y

so we got

7x+7y=10x+y
10y+x=18+x+y
we can minus x+y from both sides in all the equations to obtain

6x+6y=9x
9y=18

last one, divide both sides by 9
y=2

sub back
6x+6y=9x
6x+6(2)=9x
6x+12=9x
minus 6x both sides
12=3x
divide both sides by 3
4=x

the number is 42

why did you write it down there, oh well

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What’s the approximate area of a segment of a circle with a height 6 m and the length of the chord is 20 m? Round your answer to the nearest whole number. A. 746.67 m2


Hello!

The Correct Answer to this would be 100%:

Option “85.4”.

(Work Below)

Given:
height = 6m
chord = 20 m

We need to find the radius of the circle.

20 m = 2 √ [ 6m( 2 x radius – 6 m ) ] 
20 m / 2 = 2 √[ 6m( 2 x radius – 6 m ) ] / 2 
10 m = √ [ 6m( 2 x radius – 6 m ) ] 
(10 m)² = √[ 6m( 2 x radius – 6 m ) ] ² 
100 m² = 6 m( 2 x radius – 6 m ) 
100 m² = 12 m x radius – 36 sq m 
100 m² + 36 m² = 12 m x radius – 36 m² + 36 m² 
136 m² = 12 m x radius 
136 m² / 12 m = 12 m x radius / 12 m 
11.333 m = radius 

the area beneath an arc: 

Area = r² x arc cosine [ ( r – h ) / r ] – ( r – h ) x √( 2 x r x h – h² ). 

r² = (11.333 m)² = 128.444 m² 
r – h= 11.333 m – 6 m = 5.333 m 
r * h = 11.333 m x 6 m = 68 m²

Area = 128.444 m² x arc cosine [ 5.333 m / 11.333 m ] – 5.333 m x √[ 2 x 68 m² – 36 m² ] 

Area = 128.444 m² x arc cosine [ 0.4706 ] – 5.333 m x √ [ 100m² ] 

Area = 128.444 m² x 1.0808 radians – 5.333 m x 10 m 

Area = 138.828 m² – 53.333 m² 

Area = 85.4 m²

Hope this Helps! Have A Wonderful Day! 🙂

And as Always…

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Julie is a math tutor. She charges each student $210 for the first 7 hours of tutoring and $20 for each additional hour. When the number of hours (h) that Julie spends tutoring a student is greater than 7 (h > 7), the equation that gives the amount (A) that Julie earns in dollars is . If Julie earns $410 tutoring one student, the total number of hours she spent tutoring the student is .



Julie is a math tutor. She charges each student $210 for the first 7 hours of tutoring and $20 for each additional hour. When the number of hours (h) that Julie spends tutoring a student is greater than 7 (h > 7), the equation that gives the amount (A) that Julie earns in dollars is . If Julie earns $410 tutoring one student, the total number of hours she spent tutoring the student is .

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Kate takes the elevator from the ground floor (which is labeled 0) to a floor three levels below the ground floor. Which number represents the floor where she gets off the elevator?


Answered by answersmine AT 22/10/2019 – 02:55 AM

The number should be -3. That is because she goes from 0 to three floors bellow, meaning it’s 0-3= -3. The first floor bellow would be -1, the second would be -2, and the third one is -3. It would be different if you counted it as number 1 as they do in some countries, but here it’s -3.

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Z(q) = 4q + 1/2…The zoomster function z used in space flight engineering is defined above. If, for some number u, z(u + 1/2) = 1/2, then what is the value of u ?


We are given the equation:

Z(q) = 4q + ½    —>
1

The equation for z(u + 1/2) is obtained by
substituting q with u + ½ in the equation, therefore we can say that:

q = u + ½          —>
2

Substituting this value into equation # 1:

Z = 4 (u + ½) + ½ = z (u + 1/2) 

4 u + 2 + ½ = z (u + 1/2) 

Since it was given that   z (u +
1/2)  = ½     then,

4 u + 2 + ½ = ½

4 u + 2.5 = 0.5

4 u = -2

u = -1/2         (ANSWER)


 

 

 

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PLEASE HELP!Subtracting a negative number is the same as _____. A: Adding a positive number B: subtracting a positive number C: subtracting a negative number D: adding a negative number



PLEASE HELP!Subtracting a negative number is the same as _____. A: Adding a positive number B: subtracting a positive number C: subtracting a negative number D: adding a negative number

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Stacy goes to the county fair with her friends. The total cost of ride tickets Is given by the equation c = 3.5t, where c is the total cost of tickets and t is the number of tickets. If Stacey bought 15 tickets, she would spend how much



Stacy goes to the county fair with her friends. The total cost of ride tickets Is given by the equation c = 3.5t, where c is the total cost of tickets and t is the number of tickets. If Stacey bought 15 tickets, she would spend how much

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A rational number is a number that can be written as a _____ of two intergers.


Answer:

ratio

Step-by-step explanation:

Both of the words “ratio” and “rational” in their mathematical meaning derive from the Latin word for irrational. The word “ratio” seems to have been derived from the word “rational” after the latter came into use in English.

A rational number is one that can be expressed as the ratio of two integers.

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Best answer get Brainliest. 50 points. Emerson earns money from walking dogs and answering surveys. He earns $5 a week for each dog he walks and $0.10 for each survey he answers. Last week, Emerson answered 100 surveys and earned $35. Part A: Create an equation that will determine the number of dogs he walked. (3 points) Part B: Solve this equation justifying each step with an algebraic property of equality. (6 points) Part C: How many dogs did Emerson walk last week? (1 point)


Step-by-step explanation:

5x + 10 = 35 is your equation

5x = 35 – 10    bc u brought the 10 to the other side so its symbol changes

5x = 25         now were going to bring 5 to the other side to do that we have to divide both sides by 5 (same thing like the 10)

5x/5 = 25/5

x = 5

5 dogs

~batmans wife dun dun dun…..

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The profit a company makes from producing x tabletops is modeled by the equation P(x) = 480x – 2x^2. For what number of tabletops does the company make a profit of $0? A. 100 B. 120 C. 240 D. 480



The profit a company makes from producing x tabletops is modeled by the equation P(x) = 480x – 2x^2. For what number of tabletops does the company make a profit of $0? A. 100 B. 120 C. 240 D. 480

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The temperature on a particular day started at -13°F. It rose steadily by 3° each hour. The function y=-13+3xmodels the temperature, ehere x is the number of hpurs and y is the temperature. Graph the equation



The temperature on a particular day started at -13°F. It rose steadily by 3° each hour. The function y=-13+3xmodels the temperature, ehere x is the number of hpurs and y is the temperature. Graph the equation

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N a beanbag toss game, Janelle scores 5 points for landing on a round target and 8 points for landing on a square target. She needs more than 50 points to win. Let x represent the number of times Janelle lands on the round target and let y represent the number of times she lands on the square target. Which inequality represents the situation?



N a beanbag toss game, Janelle scores 5 points for landing on a round target and 8 points for landing on a square target. She needs more than 50 points to win. Let x represent the number of times Janelle lands on the round target and let y represent the number of times she lands on the square target. Which inequality represents the situation?

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Jeff and jill are collecting coats for kids. They hope to collect 20 coats per day to reach their goal. They have already collected 100 coats. If the function for this problem is f(c) =20d+100,describe the slope he slope represents the number of days the coats were delivered. the slope represents the number of people who donated each day. the slope represents the number of coats collected each day. None of the choices are correct.



Jeff and jill are collecting coats for kids. They hope to collect 20 coats per day to reach their goal. They have already collected 100 coats. If the function for this problem is f(c) =20d+100,describe the slope he slope represents the number of days the coats were delivered. the slope represents the number of people who donated each day. the slope represents the number of coats collected each day. None of the choices are correct.

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Jeff and jill are collecting coats for kids. They hope to collect 20 coats per day to reach their goal. They have already collected 100 coats. If the function for this problem is f(c) =20d+100,estimate the number of days it would take to collect 200 coats. 4 days 5 days 6 days None of the choices are correct.



Jeff and jill are collecting coats for kids. They hope to collect 20 coats per day to reach their goal. They have already collected 100 coats. If the function for this problem is f(c) =20d+100,estimate the number of days it would take to collect 200 coats. 4 days 5 days 6 days None of the choices are correct.

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If a number is an integer, then it is rational. True or False If false provide a counter ex.



If a number is an integer, then it is rational. True or False If false provide a counter ex.

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The sum of two numbers is 42 . The smaller number is 10 less than the larger number. What are the numbers?



The sum of two numbers is 42 . The smaller number is 10 less than the larger number. What are the numbers?

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Whats wrong with the sentence then her eye lands on a number and she sees the error



Whats wrong with the sentence then her eye lands on a number and she sees the error