Assume that ABD has a measure of 105.

Assign a variable and write an equation that will help you determine the measure of DBC.

The measure of DBC is: .

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.