B. -8+ -2(3) simplified

c.4 + -5(-3) + (-7)

d. (-4.25)(2) + (-4.)

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

answer: (c) m∠qpo + (2x + 16)° = 180°

step-by-step explanation:

the opposite angles of a quadrilateral are supplementary.

so, ∠o + ∠q = 180°   and   ∠p + ∠r = 180°

since ∠r = 2x + 16°, we can use substitution as follows:

∠p + ∠r = 180°

∠p + (2x + 16)° = 180°

to complete this square you have to rotate about the origin 270 degrees clockwise.

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.