Answer:
$0.64 per book
Step-by-step explanation:
Answer:
7 mph
Step-by-step explanation:
If b is the rate of the boat, and s is the rate of the stream, then:
b − s = 4
b + s = 10
Solve the system of equations with substitution or elimination. Using elimination, add the equations together:
2b = 14
b = 7
The boat's rate is 7 mph.
Answer:
18 cellphones
Step-by-step explanation:
75 x 6= 450
3 x 6= 18
Plug in 3 for x
f(3) = 2(3) + 1
f(3) = 6 + 1
Solution is 7
