Question

The ideal width of a safety belt strap for a certain automobile is 7 cm. An actual width can vary by at most 0.3 cm. Write an absolute value inequality for the range of acceptable widths.
A.|w – 0.3| ≤ 7

B.|w + 7| ≤ 0.3

C.|w – 7| ≤ 0.3

Answer 1

$(7-.3) \leq w \leq (7+.3)$

$6.7 \leq w \leq 7.3$

$w - 7 = -0.3$

$w = 6.7$

So the answer is

C. |w – 7| ≤ 0.3