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:
19?
Step-by-step explanation:
double of 4 is 8, double of 1/2 is 1 and adding them all together is 19
Answer:
10 thousand times loud pls mark me as the brainliset hope it helps you
Answer:
H. $26
Step-by-step explanation:
$6.50 x 4 = 26. The cost is exact.
Answer:
10x+9
Step-by-step explanation:
You first have to multiply 3 into the parenthesis because you have to use distributive property.
Once you do that you get 3x+9+7x.
Combine like terms.
10x+9
