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Dvinal [7]
3 years ago
7

Can i get some help with #6

Mathematics
2 answers:
lara31 [8.8K]3 years ago
8 0
Just break it up
4x^2 needs to equal 240
So find what equals 240 when multiplied by 4
ollegr [7]3 years ago
6 0
4(x^2) + 2 - (242) ➡0
(2^2 x^2 + 2) - 242 ➡0
4 (x^2 - 60)
Now factor: x^2 -60
4 (x^2 - 60) ➡0
4 ➡0[solve]
x^2➡±60 [by the way]
X ➡ ±  √15 [⬅this might be your answer if you're working with square roots]
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If the ratio of boys to girls is 5:7

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we can plug this value into the ratio by doing something like:

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Because the ratio has to be the same, we can substitute x for the number of boys and solve by the cross method or whatever you guys call it.

5            x

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The x in the middle is just to show the direction you are multiplying.

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605 is your answer.

The cross method can be used in most situations.

* is used to represent multiplication btw

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