No, they forgot to switch variable labels after solving for the independent variable...
y=-8x+4
y-4=-8x
(y-4)/-8=x
Now that you have solved for the independent variable x, you switch the variable labels...
y=(x-4)/-8
f^-1(x)=(x-4)/-8 which should really be rewritten as:
f^-1(x)=(4-x)/8 :P
Answer: 9, 1/20, 9/20
Step-by-step explanation:
1) 9 pieces
2) Size of each pieces:

3) Area of the shaded rectangle:

Answer: 
Step-by-step explanation:
DIAMETER length = 6
radius length = 3
Area of the circle = 
Answer:
is should be 11 hours hope it helps
Step-by-step explanation:
sorry if wrong people i didnt mean to tho
Answer:
9
Step-by-step explanation:
x didn't change in value, y changed by 9
the distance between the two points is 9