How do i know what a, b, and c are?

Step-by-step explanation:

ax²+bx+c=0

so 4x²-13x+3=0

a=4 b=-13 c=3

10 * 563.67 = 5636.7

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°