Answer:
Let the current speed be "c";
Then the boat speed in still wate is "5c":
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Upstream speed:
distance = 12 miles ; rate = 5c-c = 4c mph ; time = 12/4c = 3/c hrs
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Downstream speed:
distance = 12 miles ; rate = 5c+c = 6c mph ; time = 12/6c = 2/c hrs
Step-by-step explanation:
Equation:
time + time = 2 1/2 hrs
3/c + 2/c = 5/2
Multiply thru by 2c to get:
6 + 4 = 5c
c = 2 mph (speed of the current)
5c = 10 mph (speed of the boat in still water)
Answer:
i have the same q on my test i need answers 2 :<
Step-by-step explanation:
V = whl
V = 3 1/2 * 4 1/2 * 2
answer
3 1/2 * 4 1/2 * 2
15 3/4 * 2
#1 - We're doing 3 * 3 * 3, so 3 * 3 is 9 and 9 * 3 is 27. So the answer you are looking for is C.) 27.
#2 - The answer is C.) 6/7. (Couldn't figure out a way to explain this sorry...)
Answer:
Step-by-step explanation:
(Assuming the den is a rectangle)
Let be the length of the den. Because the length is 10 feet longer than the width, the width of the den can be represented as .
The area of a rectangle is given as , therefore we can form the following equation:
Expanding this, we have:
This factors into , therefore .
Because -11 is extraneous, the length of the den is feet and the width is . Thus, the dimensions of the den are .