A cube has side length x. One side of the cube is increased by 4 inches, and another side is doubled. The volume of
2 answers:
9514 1404 393
Answer:
(b) 5 inches
Step-by-step explanation:
A graphing calculator makes short work of the problem. No system of equations is needed.
The volume of the new prism is ...
V = LWH
450 = x(x+4)(2x)
x(2x)(x+4) -450 = 0 . . . . . equation for graphing
The only real solution is x = 5.
The side length of the original cube was 5 inches.
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