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Scrat [10]
2 years ago
7

I need help solving this thing.

Mathematics
1 answer:
blondinia [14]2 years ago
6 0

Answer:

x=-3  y=-1

(-3,-1)

Step-by-step explanation:

-1(2x-7y=1)

-7x-7y=28

-2x+7y=-1

-9x=27

x=-3

-2*-3-7y=1

y=-1

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Call the price of the bike before mark up 'x', then we have:

x + 0.25x = 210
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Therefore, the bike cost $168 before 25% price increase.


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Answer:

Average employee [Mean] = 43.6

Step-by-step explanation:

Given:

Interval   Number of employee

25-35                      20

35-45                      7

45-55                      8

55-65                     15

Total                       50

Find:

Average employee [Mean]

Computation:

Interval     X[u+l]/2 Number of employee   fx

25-35         30           20                              600

35-45         40             7                              280

45-55         50            8                              400

55-65         60            15                             900

Total                           50                            2,180

Average employee [Mean] = Sum of fx / Sum of x

Average employee [Mean] = 2,180 / 50

Average employee [Mean] = 43.6

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Answer:

yes it is cause the answers 258

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