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Reptile [31]
3 years ago
12

Which algebraic expression represents “twice the sum of y and 9”

Mathematics
2 answers:
Aleksandr [31]3 years ago
8 0
2(y+9) is the algebraic expression.

Hope this helps!!

tankabanditka [31]3 years ago
3 0

To answer this question we will have to keep the following two points in mind:

#1. The <u>sum</u> of a number with another number means to <u>add </u>the given two numbers.

#2.<u> Twice</u> means to <u>multiply by 2.</u> In other words it means to double.

Therefore, "twice the sum" would mean to multiply the sum by 2.

Now, in our question we will have, "the sum of y and 9 would be: y+9 and twice this sum would be: 2(y+9)

Thus, "twice the sum of y and 9" is: 2(y+9)

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The lemonade recipe calls for 4 scoops of lemonade powder for each quart of water. Each quart is equivalent to 4 cups. Let n rep
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Answer:

B. 5 ≤ n≤ 8

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Step-by-step explanation:

Jada is making lemonade for a get together with her friends. She expects a total of 5 to 8 people to be there (including herself).?

She plans to prepare 2 cups of lemonade for each person. The lemonade recipe calls for 4 scoops of lemonade powder for each quart of water. Each quart is equivalent to 4 cups. Let n represent the number of people at the get together, c the number of cups of water, S the number of scoops of lemonade powder. Select all the mathematical statements that repsent the quantities and constraints in the situation.

A. 5<n<8

B. 5≤ n≤8

C. c=2n

d. S = c

e. 10<c<16

f. 10≤S≤16

Let

n = number of people at the get together,

c = number of cups of water,

S = number of scoops of lemonade powder.

She expects a total of 5 to 8 people to be there (including herself).

B. 5 ≤ n ≤ 8

She plans to prepare 2 cups of lemonade for each person.

With minimum of 5 people and maximum of 8 people

2 × 5 = 10

2 × 8 = 16

f. 10≤S≤16

The number of cups of water is twice the number of people at the party

C. c=2n

Number of scoops of lemonade powder is equivalent to number of cups of water

d. S = c

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