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2 years ago

18.

Mathematics

1 answer:

skad [1K]2 years ago

6 0

9514 1404 393

Answer:

a) 10(3x+2) ≤ 140; x ≤ 4

b) no

Step-by-step explanation:

a) The area is the product of length and width. We want that product to be no greater than 140:

10(3x +2) ≤ 140 . . . . your inequality

We can solve this by dividing by 10 first.

3x +2 ≤ 14

3x ≤ 12 . . . . . . subtract 2

x ≤ 4 . . . . . . . . divide by 3; the solution to the inequality

b) If the length were 15, the area would be 10×15 = 150, which is greater than 140. The length cannot be 15 if the area is at most 140.

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