Answer:
144
Step-by-step explanation:
angle A + angle B = 180 (supplementary angle)
A = 4B
4b+b=180
5b=180
Divide 5 on both sides to get b=36
180-36= measure of angle A
180-36=144
1. $129.60
2. $109.90
3. $66.10
Solve the system by graphing
{y = 7 - x the slope is -1 and the y intercept is 7
{x + 3y = 11 3y = -x+11 y = 1/3 x + 11/3 the slope is 1/3 and the y intercept is 11/3
The solution is x=5, y=2 you will need to graph
Classify the system without graphing
{2x + y = 3 y = -2x+3
{y = -2x - 1
These lines are parallel same slope different y intercept
C) Inconsistent System
Classify the system without graphing
{x + 3y = 9
{-2x - 6y = -18 divide by -2
x+3y = 9
same line
A) Dependent System
