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:
Step-by-step explanation:
A) Sixth would be: 6 * 5 = 30 parts
B) It would be: 1/6 yd = 6 inches
Hope this helps!
Answer:
2x+12 = 20
x = 4
Step-by-step explanation:
Twice a number = 2x
increased by 12 = +12
Format:
2x + 12 = 20
Solve
Subtract 12 from both sides
2x + 12 - 12 = 20 - 12
2x = 8
divide both sides by 2
2x/2 = 8/2
x = 4
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-Chetan K
Put 1st equation into second
-2x -(x/2 - 10) = 5
-2x -1/2x + 10 = 5 combine like terms
-2.5x + 10 - 10 = 5 - 10
-2.5x = -5 divide both sides by 2.5
x = 2
