Question

∠A and ∠B are supplementary angles. m ∠A is 9° less than twice m ∠B. Find m ∠A and m ∠B.

I am aware that m 12 years ago

Answer 1

Let's represent angle A and angle B algebraically.

How would you represent those 2 angles?

Answer 2

Im not sure

Answer 3

Let angle B = x

Now, angle A is 9 less than twice angle B. So that translates to
2x - 9 (not 9 - 2x........9 less than something is that something - 9).

Answer 4

so is that 2x-9 =180? solve for x and get A?

Answer 5

well, the SUM of the two angles, A and B, equals 180.

so what is the correct equation?

Answer 6

x+(2x-9) =180

Answer 7

Yes!

Now solve the equation.

Answer 8

x=63, which is m<B and m<A= 117

Answer 9

Exactly!