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1. A painter will paint n walls with the same size and shape
in a building using a specific brand of paint.
The painter’s fee can be calculated by the expression nKAh, where n is the number of walls,
K is a constant with units of dollars per square foot, A is the length of each wall in feet,
and h is the height of each wall in feet.
If the customer asks the painter to use a more expensive brand of paint,
which of the factors in the expression would change?
A) h B) A C) K D) n
2. y = a(x− 2)(x + 4)
In the quadratic equation above, a is a nonzero constant.
The graph of the equation in the xy-plane is a parabola with vertex (c,d).
Which of the following is equal to d ?
A) −9a
B) −8a
C) −5a
D) −2a