Add 7 to both sides
3x + 12 = 7x
Subtract 3x
12 = 4x
Divide by 4
x = 3
Radius=8/2=4cm
volume=4*4*3.14*20=1004.8
The answer is 1004.8cm₃
So the points are (-3/7,-8/3) and (-5/2,-2)
to find the slope do
(y2-y1)/(x2-x1)
(x,y)
x1=-3/7
y1=-8/3
x2=-5/2
y2=-2
subsitute

simplify by finding similar denomenators


add

multiply top and bottom by



answer is
slope=