(4x + 4)(ax – 1) – x2 +4
In the expression above, a is a constant. If the
expression is equivalent to bx, where b is a constant,
what is the value of b?
A) -5
B) -3
C) 0
D) 12

step-by-step explanation:

just plug in each number for x and see which ones work and don't

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c

what is the question? i am guessing you are looking for the area.

to find an area, you have to do length x width.

in this case, it would be 12 ft x 4 ft = 48 sq. ft