Answer:
171 degrees
Step-by-step explanation:
x + 9 = 180
x = 171
Answer:
the first blank would be 2
the second blank would be 2
Step-by-step explanation:
whatever you multiply the denominator by, you multiply the numerator by the same number
i am 70% sure this is correct
Answer:

Step-by-step explanation:
Given:
The given equation is 
We need to solve the given equation for r.
Rewrite the equation as.

Divide both side of the equation by 4π and simplify


Take the square root both side of the equation.


Therefore, the solution for r is both positive or negative 
Answer:
A
Step-by-step explanation:
When completing the square, the first thing you want to do is get all of the numbers on one side, and all the x terms on the other.
Answer:
Step-by-step explanation:
(a+b)^2=a^(2)+2ab+b^(2)
(a-b)^2=a^(2)-2ab+b^(2)
13)
(x+2)^(2)-(x-1)^2
x^(2)+4x+4-(x^(2)-2x+1)
x^(2)+4x+4-x^(2)+2x-1
6x+3
15)
(x+5)^(2)-(x+1)^2
x^(2)+10x+25-(x^(2)+2x+1)
x^(2)+10x+25-x^(2)-2x-1
8x+24