A contractor built a basement for a new home. The volume of the rectangular basement shown at the right is represented by the ex
pression 3x3+6x2-30x. If the height of the basement is 3x, what is the area of its base?
2 answers:
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Hoi!
To solve this, first plug in the values for x and y.
x = 2, so anywhere you see x, put 2 in its place.
y = 3, so anywhere you see y, put 3 in its place.
4 × 2 = 8
× 3 = 
= 
is your answer.
To solve this, first plug in the values for x and y.
x = 2, so anywhere you see x, put 2 in its place.
y = 3, so anywhere you see y, put 3 in its place.
4 × 2 = 8