Http://www.personal.kent.edu/~bosikiew/Algebra-handouts/circles.pdf
I found this is may help but I don't know for sure.
You solve an expression for a variable if that variable sits alone on one side of the equation, and everything else is on the other side.
So, our goal is to leave 
alone on the right hand side, and move everything else to the left.
So, we start with
We multiply both sides by 3:
We divide both sides by 
To compute the required height, simply plug in the values:
3•1 3/4 is Greater than 1 3/4
Answer:
Step-by-step explanation:
2%, 0.20, 1/2, 2.1 x 10-2
Answer:
1. $18.90
2. Every statement is true EXCEPT e
Step-by-step explanation:
For number 1. We first need to find how much one ticket costs. To find this we divide profit by number of tickets sold. So,
13.50/15 = $0.90
So to find the cost of 21 tickets we times the cost per ticket by 21
21 x 0.90 = 18.9
So $18.90
2.
They sold 6 cases in 40 minutes.
6/40 = 0.15
They sell 0.15 cases per minute
For a we wanna see if they can sell 27 cases in 180 minutes so
0.15 x 180 = 27
So a is true
B)
0.15 x 80 = 12
So b is true
C)
0.15 x 120 = 18
C is true
D)
0.15 x 160 = 24
D is true
E)
0.15 x 200 = 30
E is false
