Answer:
-9
Step-by-step explanation:
9=b-2b
9=-b
divide both sides by -
b=-9
Answer:
Do not listen to the other answer! Here is how you solve that.
Step-by-step explanation:
For the semicircle, here is the formula for area: 
For the triangle, here is the formula for area:
Then, add.
So,
Triangle:


Semicircle:


Your answer is 
40 + 2x - 30 + x + 20 = 180
3x + 30 = 180
3x = 150
x = 50
m<B = 2x - 30
m<B = 2(50) - 30
m<B = 100 - 30
m<B = 70
Answer:
15 seconds
Step-by-step explanation:
120/8=15
There ain’t even T on the graph show the whole graph and maybe we can help you answer the question Karen