Answer:
D. 
Step-by-step explanation:
The given expression is;

This is the same as;

The denominators are the same.
Subtract the numerators and write one denominator;

Rewrite to get;

P=2x-7 + 5x-3 +2x-2
P= 9x -12
7.5, 7.058, 8.508,
8.58
Step-by-step explanation:
The answer to the first part is (4,1).
The answer to the second part is (11,2).
The formula in computing the area of the circle is:
A = pi (r)^2
Where r = the radius of the circle
Since you are only given the diameter of the circle, you
have to solve for its radius. The radius of the circle is half its diameter. Therefore,
the radius of the circle is 5 (10/2).
Now, you substitute the measurements to the formula:
A = 3.14 (5)^2
A = 3.14 (25)
A = 78.5 sq. units