Answer:
b = 90
Step-by-step explanation:
Sum the interior angles of the pentagon and equate to 540
Starting from the top and going clockwise
b + b + 45 + 90 + 2b - 90 + b = 540 ← simplify left side
b + 45 = 540 ( multiply through by 2 to clear the fraction )
11b + 90 = 1080 ( subtract 90 from both sides )
11b = 990 ( divide both sides by 11 )
b = 90
Thus
b + 45 = 90 + 45 = 135
2b - 90 = 2(90) - 90 = 180 - 90 = 90
b = × 90 = 135
The angle measure from the top clockwise are
90°, 135°, 90°, 90°, 135°
Answer:
25 percent off 60.00 is 45.00
Step-by-step explanation:
Answer:
mx+b
m=slope
b=y-intercept
Step-by-step explanation:
We will assume that he does not replace the first one.
He needs to choose 2 good one from 16 good ones. How can he do this?
The total number of ways of choosing 2 lightbulbs [good or bad] is
So the probability of getting a good light bulb is