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Gala2k [10]
3 years ago
8

Evan and Dana Each work two part-time jobs to earn $500 per week in order to pay bills. Evans college schedule allows him to wo

rk a total of 30 hours per week. A department store pays him $9.50 per hour. A fast food restaurant pays him $8.50 per hour. Dana's college schedule allows her to work a total of 25 hours per week for a grocery store that pays her $10 per hour and for a craft store that pays her $8 dollars per hour.
Mathematics
1 answer:
vagabundo [1.1K]3 years ago
8 0

Answer:

irdk ez stuff

Step-by-step explanation:

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Solve <br> 6r + 7 = 13 + 7r
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r = -6

Step-by-step explanation:

6r + 7 = 13 + 7r

-6r both sides

7 = 13 + r

-7 both sides

r + 6 = 0

-6 both sides

r = -6

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Geometry<br><br>Need help finding A and B
MariettaO [177]

Answer:

  a = 8

  b = 4√5

Step-by-step explanation:

Corresponding sides of similar triangles are proportional.

  short side/long side = a/16 = 4/a

  a² = 64 . . . . . . multiply by 16a

  a = 8 . . . . . . take the square root

__

  hypotenuse/short side = b/4 = 20/b

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_____

<em>Additional comment</em>

These relations for the right triangle can be summarized by the rule "the length of a segment that touches the hypotenuse is the geometric mean of the two hypotenuse segments it touches." In the case of b, that means ...

  b = √((4)(4+16)) = 4√5

The same sort of relation applies to the unmarked vertical segment on the left:

  c = √((16)(16+4)) = 8√5

And, we saw ...

  a = √((4)(16)) = 8

Of course, if this rule is to make sense, you need to know that the geometric mean of two numbers is the square root of their product. (In general, the geometric mean of n numbers is the n-th root of their product.)

4 0
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