Statement Reason m∠AOB=180 degrees def of straight

m∠AOF+m∠FOG+m∠GOB=m∠AOB Parts-whole postulate

5x+15 degrees+90 degrees+2x=180 degrees substitution given

x=?

step-by-step explanation:

i am not sure sorry : c

step-by-step explanation:

we are given

since, we have to isolate x on anyone side

so, we can move all x terms on one side

subtract both sides by 2x

add both sides by 9

divide both sides by 4

we get

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.