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alexgriva [62]
3 years ago
8

The mean age of 5 people in a room is 28 years.

Mathematics
1 answer:
lina2011 [118]3 years ago
4 0

Answer:

174

Step-by-step explanation:

You should look at the mean and do this:

5*28 so now you know all the ages which is 140 now you do 140/29 and you get 4.8....... so you  can see that the answer is 174

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What is a necessary step for constructing perpendicular lines through a point on a line?
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Answer:

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Step-by-step explanation:

Bisect a Segment:

Step 1 - open up your compass so that it is slightly larger than the segment. Put the compass on point A on the given segment and swing an arc above and below the lines. Do the same on point B. Create the points where the circle intersects.

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Rachel took clothes to the cleaners three times last month. First, she brought 3 shirts and 1 pair of slacks and paid $11.46. Th
balandron [24]

Answer:

  • $2.49 each shirt
  • $3.99 each slacks
  • $7.49 each sports coat

Step-by-step explanation:

If we let s, p, c represent the cost of cleaning the shirts, pants, and coats, respectively, the problem information lets us write three equations:

  3s +1p +0c = 11.46

  5s +2p +1c = 27.92

  5s +0p +1c = 19.94

__

A variety of methods and tools are available for solving these equations. We can do it "by hand" using elimination and substitution.

Subtracting the 3rd equation from the 2nd, we get ...

  (5s +2p +c) -(5s +c) = (27.92) -(19.94)

  2p = 7.98

  p = 7.98/2 = 3.99

Substituting this value into the first equation gives ...

  3s +1(3.99) = 11.46

  3s = 7.47 . . . . . . . . . . subtract 3.99

  s = 7.47/3 = 2.49

Substituting this value into the last equation gives ...

  5(2.49) +c = 19.94

  c = 7.49 . . . . . . . . . . . subtract 12.45

Rachel was charged ...

  $2.49 for each shirt

  $3.99 for each pair of slacks

  $7.49 for each sports coat

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