Answer:
B
Step-by-step explanation:
When you multiply 2 equations together, you just multiply them. You'd get x(3x-20) = 3x^2 - 20x, which is B
90+31= 121
3x-1+121=120
3x+120=180
-120
3x=60
Divide by 3 on both sides
X=20
Answer: $66.50
Step-by-step explanation:
7% of $950 is $66.50
Average rate = [h(3) - h(0)]/(3 - 0)
h(3) = 300 - 16(3)^2 = 300 - 16(9) = 300 - 144 = 156
h(0) = 300 - 16(0)^2 = 300
average rate = (156 - 300)/3 = -144/3 = -48
Therefore, the object falls with an average rate of 48 ft/s during the first 3 seconds.
