15r + 8 = 11r - 20 solve for r and show your work in rows

r=-7

Step-by-step explanation:

r= -7

Step-by-step explanation:

15r+8=11r-20 (minus 11r from both sides)

4r+8=-20 (minus 8 from both sides)

4r = -28 (divide both sides by 4)

r= -7

step-by-step explanation:

circumference divided by 3.141592654 then timesthe radius twice

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°