Answer:
rate of motorboat: b
rate of current: c
So the rate the boat travels upstream is $b - c$, and the rate it travels downstream is $b + c$
Step-by-step explanation:
d = rt
200 = (b - c)\cdot 5
200 = (b + c)\cdot 4
b - c = 40
b + c = 50
Adding these equations, we get:
2b = 90
b = 45
So
c = 50 - 45 = 5
<u>Therefore the rate of the boat is 45kph, and the rate of the current is 5kph</u>
Hope this helps :)
Answer:
use the formula- 10^2+x=15^2 and then subtract 15^2 from 10^2
Step-by-step explanation:
Answer:
infinitely many solutions
Step-by-step explanation:
12x-10=12x-10
12x=12x
x=x
Answer:
x ≤ -7
Step-by-step explanation:
