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hammer [34]
3 years ago
15

Last week donnell practiced the piano 3 hours longer than marcus . Together donnell and marcus practiced the piano for 11 hours

. for how many hours did each young man practice the piano ?
Mathematics
2 answers:
natima [27]3 years ago
8 0
The answer would be 7 for Donnell and 4 for Markus. There isn't any way that you can find an answer you just have to use guess and check!( at least, that's what I do) . So first I guessed 8 and 5 but that equaled 13. That told me to go down. Now I guessed 7 and 4 which gave me 11.
Over [174]3 years ago
3 0
X= Marcus
x+3= Donnell

x+x+3= 11
2x+3= 11
2x= 8
x=4  for marcus
4+3= 7 for donnell
hope this helps


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A car salesman has 8 used cars for sale. They have a mean price of $4500. What is the total price of all 8 cars?
muminat

Answer:

$36000

Step-by-step explanation:

We have a mean price of $4500 this means that in the 8 cars we have cars with higer and lower prices than $4500 but that if we have to give the same price to 8 cars that would be $4500. Then to know the total price of the all 8 cars we just have to multiply:

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It is only 1 proportion, and it is 1 problem.

10 8
---- = ---
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7 0
4 years ago
Help? *****20 Points?*****
boyakko [2]
For both of these questions you want to raise every part to the 4th or 2nd power. Just remeber that a power raised to a power is just multiplied.

3.)
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4.)
2^2 = 2×2 = 4
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3 0
3 years ago
Read 2 more answers
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skelet666 [1.2K]

The midpoint is

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