17. Of 10 test scores, six are less than or equal to 80. What is the percentile rank of a test score of 80?

55 because 55 + 55 = 110 good luck babe

m∠abd = m∠dbc

step-by-step explanation:

given : ab bisects ∠dbc

as we know that bisection means ab divides   ∠dbc   in two equal angles named as   ∠dba and   ∠abc

so, m∠abd = m∠dbc  

because ab bisects ∠dbc.

hence , the first statement m∠abd = m∠dbc is true.