Find the measure of angle A:
find the measure of angle B:

Hi...

2x+4+2x-9+x=180

5x-5=180

5x=185

X=185/5=37so

A=2*37-9=65

B=2*37-4=70

see explanation

Step-by-step explanation:

Sum of all angles in a triangle is 180

So add all those angles together equals 180.

2x + 4 + 2x -9 + x = 180

Combine like terms.

5x -5 = 180

5x = 185

X = 37

Now plug x in for the angles

A = 2x -9

A = 2(37) - 9

A= 74 - 9 = 65

B = 2x + 4

B = 2(37) + 4

B = 74 + 4

B = 78

your welcome haha, this is the best place to find answers

-14

step-by-step explanation:

2x2 – 2(x+4)

=2x2-2（5+4）

=4-2×9

=4-18

=-14