Answer:
2.3
Step-by-step explanation:
138 divided by 60=2.3
divide the amount consumed by the total number of households involved
Just find the slope between the points
basically find (f(10)-f(7))/(10-7)
f(7)=7^2-3(7)-4=49-21-4=24
f(10)=10^2-3(10)-4=100-30-4=66
slope=(66-24)/(10-7)=42/3=14
average rate of change is 14
Answer:
B.
Step-by-step explanation:
x < 2 means all numbers less than 2. that is an open dot on 2 and shading to the left.
x >= -8 means -8 and all numbers greater than -8. that is a closed dot on -8 and shading to the right.
Answer: B.
Answer:
128
Step-by-step explanation:
Set this up as a proportion with miles on the top and km on the bottom:

If we want to know how many km are in 80 miles, we put the variable with the km stuff on the bottom and 80 on top and cross multiply to solve for the variable:
so
5x = 640 and
x = 128
That means that 80 miles is equivalent to 128 km