Given that bisects ? dbc, which statement must be true? m? abd = m? abc ab ? bc b is the midpoint of dc. m? dbc = 90°

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7

yes

step-by-step explanation:

so of course you want to start by plugging the 5 in which goes to 7(5)+3(5)=50 because 7*5=35 and 3*5=15 and then add them together, then plug in the 5 to the other equation as well 9(5)+5=50 because 9*5= 45 and then add 5 and so yes they are equivalent.

i dont know what you want me to answer for this but im guessing 2: 11?