I think you are doing limits so this is what I did
and that's how I factored using the box method because it's easier to track distribution.
Step-by-step explanation:
Sum of opposite angles are supplementary,
x + 60 + 3x = 180
4x + 60 = 180
4x = 180 - 60
4x = 120
x = 120 / 4
x = 30
Answer:
$3.35
Step-by-step explanation:
volume of balloon in the shape of sphere= 4/3 * pi * r^3 = 4.189 cubic foot
cost of 1 cubic foot of helium = 0.8
cost of 1 * 4.189 cubic foot of helium = 0.8 * 4.189 = 3.35