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VikaD [51]
3 years ago
5

Determine whether each number is a solution of the inequality below. 3x+4<-7

Mathematics
1 answer:
ElenaW [278]3 years ago
7 0

Step-by-step explanation:

3x + 4 < -7

3x < -7 - 4

3x < -11

x < -11/3 ≈ -3,666

x = {3,2,1,0, etc}

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Answer:

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Step-by-step explanation:

Let Q = the number of quarters and D = the number of dimes.

Then:

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2) 0.25Q+0.1D = $7.75 "...she had a total of $7.75."

Rewrite equation 1) as: D = 40-Q and substitute into equation 2).

2a) 0.25Q+0.1(40-Q) = 7.75 Simplify the left side.

 

2b) 0.25Q+4-0.1Q = $7.75 Subtract 4 from both sides.

2c) 0.25Q-0.1Q = 3.75 Combine the like-terms on the left side.

2d) 0.15Q = 7.75 Divide both sides by 0.15

2e) Q = 25 and:

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D = 40-25

D = 15

Jenna had 25 quarters and 15 dimes.

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3 years ago
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