Use the formula: x=x1+k(x2-x1), y=y1+k(y2-y1), k is the ratio of the first segment to the whole line segment. in this case, k=1/4
so x=[4+1/4(12-4)]=6
y=[9+1/4(-5-9)]=5.5
so the answer is (6, 5.5)
Area of a circle= the circumference squared over 4 pi
// I'm going to assume that pi is being rounded to 3.14
A= 10 squared over 4(3.14)
A= 7.96 inches squared
39/49 would be in simplest form for fractions 0.795 would be the fraction converted to a decimal
Let the number be n. Then 0.5n+125=800.
Multiply all 3 terms by 10:
5n+1250=8000, or n = 6750 (answer)