Start with the given formula for the surface area of a sphere.
Now substitute 2x + 5 in for r, the radius.
Then simplify the expression and write it in standard form.
10.
sam=(4,2)
theater=(-3,5)
11.
it has 4-(-3)=7 kilometers distance in x direction
and has 5-2=3 kilometers distance in y direction
12.
5-9=-4
so restaurant=(-3,-4)
13.
(5-(-4))/2=9/2=4.5
5-4.5=0.5
so seth=(-3,0.5)
and 
. So we have a remainder of
and 
. Subtracting this from the previous remainder gives a new remainder
and 
. Subtracting this from the previous remainder gives a new one of
and we're done since 2 does not divide 
. So we have
