Question

What is the answer to the first problem?
Responses
A l = vw/hl = vw/h
B l = v/whl = v/wh
Question 2
The first step in solving the second equation is to ______________ 2wh
Responses
A subtractsubtract
B addadd
Question 3
What is the answer to the second equation?
Responses
A l = SA + 2wh/2w +2hl = SA + 2wh/2w +2h
B l = SA - 2wh/2w +2hl = SA - 2wh/2w +2h
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Answer 1

Answers:
1) B — l = v/(wh). (From v = lwh, divide both sides by wh.)
2) A — subtract. (Subtract 2wh from both sides of SA = 2wl + 2wh + 2hl.)
3) B — l = (SA − 2wh)/(2w + 2h) (equivalently (SA − 2wh)/[2(w + h)]).