What is the measure of x?

A: 12
B: 9
C: 15
D: 6

Your answer is

b.9

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Step-by-step explanation:

- (2, -7)

- lines r and s and lines t and u must be parallel

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)