Assignment: 
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Answer: 
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Explanation: 
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Note: 
[ Step One ] Multiply Both Sides By 9
[ Step Two ] Simplify
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Answer:
Let b = rate of the boat.
Let r = rate of the river.
The rate going downstream is b + r.
The rate going upstream is b - r.
rate x time = distance
4(b + r) = 144 ---> b + r = 36 [divide both sides by 4]
9(b - r) = 144 ---> b - r = 16 [divide both sides by 9]
Add town: 2b = 52
Divide by : b = 26 mi/hr
r = 10 mi/hr
Step-by-step explanation:
21 is the answer i think idk try dividing them all or finindng something or look up how to find a standard deviation
16x^2-vox=0 when x=2 so
16x^2-vox=0
64-2vo
64=2vo
vo=32 ft/s
30 because 18 and the plain goes into 12 which is 30
I think
