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scoundrel [369]
2 years ago
9

Vicky jogged 2 3/4 miles in 1/2 hour.What was her average rate of speed in miles per hour?

Mathematics
1 answer:
lawyer [7]2 years ago
8 0
(2 3/4) / (1/2) = x / 1.....2 3/4 miles to 1/2 hr = x miles to 1 hr
(11/4) / (1/2) = x/1
cross multiply
(1/2)(x) = (11/4)(1)
1/2x = 11/4
x = (11/4) / (1/2)
x = 11/4 * 2/1
x = 22/4
x = 5 1/2 <=== she jogged 5 1/2 miles per hr
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6 0
1 year ago
1. 2x + 4 = 3(x – 2) + 1
sweet [91]
Please, do not post more than 1 or 2 questions at a time.  Out of courtesy I will address one of your six questions here:

<span>2x + 4 = 3(x – 2) + 1

You are to solve this for x.

1) perform the multiplication:     </span><span>2x + 4 = 3x - 6 + 1
2) combine like terms:                4+6-1 = x
3) solve for x:                              x = 11
4) check:  Is 2(11) + 4 = 3(11-2) + 1 true?
   Is 22+4 = 33-6 true?  NO.  Try again, looking for the mistake:

</span><span>2x + 4 = 3(x – 2) + 1  =>   2x + 4 = 3x - 6 + 1
                                                  4 = x - 5
                                                  9 = x

Check:  Is 2(9) + 4 = 3(9-2) + 1 true?  Is 18+4 = 22 true?  YES.
The solution to #1 is  x = 9  (answer).

Submit your other questions separately, please.

</span>
8 0
3 years ago
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total 394      289 is less than this so its acute
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x = 0

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