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andrew-mc [135]
3 years ago
8

CAN SOMEONE PLEASE HELP WITH THIS IT I URGENT

Mathematics
1 answer:
olga_2 [115]3 years ago
4 0

Answer:

Step-by-step explanation:

9+7+2=18

But since there are only 12 people in the class, its overlapping. So 18-2(the people that have nether), is 16.

So 16-12 is 4. Therefore 4 people have both a brother and a sister.

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A trader bought x mangoes at the rate of 4 mangoes for 10 naira, five of the mangoes were bad so he sold the remaining at the ra
Artemon [7]

Answer:

  20

Step-by-step explanation:

The cost of the x mangoes was ...

  c = 10(x/4)

The revenue from the sale of mangoes was ...

  r = 20(x-5)/5

The profit is the difference between revenue and cost:

  10 = r - c = 20(x -5)/5 -10(x/4) = 1.5x -20 . . . . substitute and simplify

  30 = 1.5x . . . . . add 20

  20 = x . . . . . . . .divide by 1.5

The trader bought 20 mangoes.

_____

<em>Check</em>

He paid 20(10/4) = 50 naira. He sold the 15 good mangoes for 20/5(15) = 60 naira, so made a 10 naira profit.

8 0
3 years ago
C = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5%7D%7B9%7D%20" id="TexFormula1" title=" \frac{5}{9} " alt=" \frac{5}{9} " al
Airida [17]
<span><span>F=9c+160/5

(add 160/9 to both sides then divide both sides by 5/9)


</span></span><span><span>
</span></span>
4 0
3 years ago
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