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Cary calculated the surface area of a box in the shape of a rectangular prism. She wrote the equation 148=2(6w+6h+hw) to represent the width and height of the box. She solved for w and got w=74-6h/h+6 Which of the following is an equivalent equation? 
1.w=148-6h/12+h
2.w=148-12h/12+2h
3.w=136-14h
4.w=136-10h

Verified Answer :

Just took the quiz.

The answer is w = 148-12h/12+2h

Answer: 2. \(\frac{148-12h}{12+2h}\)

Step-by-step explanation:

Given: Cary calculated the surface area of a box in the shape of a rectangular prism.

The equation written by Cary to represent the width and height of the box.  :

\(148=2(6w+6h+hw)\)

If we open the bracket on the right side, we get

\(148=12w+12h+2hw\\\\\Rightarrow148=12h+12w+2hw\\\\\Rightarrow148=12h+w(12+2h)\\\\\Rightarrow148-12h=w(12+2h)\\\\\Rightarroww=\frac{148-12h}{12+2h}\)

Hence the equation  is equivalent to the equation written by Cary after solved for w \(w=\frac{74-6h}{h+6}\) is \(\frac{148-12h}{12+2h}\)