5x + 20 = 90 - a = 90 - (3x + 40)
5x + 20 = 90 - 3x - 40 = 50 - 3x
5x + 3x = 50 - 20
8x = 30
x = 30/8 = 15/4
b = 3(15/4) + 40 = 45/4 + 40 = 51.25
The measure of a supplementary angle is 180 - 51.25 = 128.75
Answer:
average mean not sure please
Answer:
I think B is true
Step-by-step explanation:
No timee
Answer:
Step-by-step explanation:
Scroll down to the bottom of the screen and click on contact us
Answer:

Step-by-step explanation:
First simplify the equation.
Now multiply both sides by 3.
I hope it helps you. Please choose my answer as the BRAINLIEST.