16 of Cassie's dominoes are standing and the other 5 dominoes have fallen over. What is the ratio of the number of dominoes fallen over compared to the number of dominoes still standing? Write your answer as a fraction.

each side has a different length.  

step-by-step explanation:

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°