Answer:
From what I can tell from the image, b is equivalent to B.) 50°
Step-by-step explanation:
So to start off 2a=80° there is 2 a's. so you subtract 80° from 180° to get 100°.
now b=c and their is 100° left over. So 100°/2 is 50° because if b=50° and c=50° both angles equal 100°.
Answer:

Step-by-step explanation:
Notice how it passed through at exactly (3,2) and (6,4).
By taking the formula for slope:

Substituting this into the slope-intercept form
y = mx + b
where m is the slope of the line and b is the y-intercept.
Since we were not given the y-intercept and the line started or passes through (0,0), we can safely assume that b = 0.
Therefore,

Answer:
(a.)
y = 6
y = 0
y= 10
(b.)
B
Step-by-step explanation:
(a.)
y = 6
y = 0
y= 10
(b.)
B
Answer:
A: Area of 4 walls - door - window = 2x11x8 +2x12.5x8 - 3x7 -3x2 = 349 (ft2)
B: Cost: 349 x 0.8 = 279.2 $
I believe the answer you are looking for is 24%