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2 years ago

What two numbers multiply to -120 and add to -2

Mathematics

1 answer:

USPshnik [31]2 years ago

5 0

Hello!

To answer this question we need to find the factors of -120.

The total set (both negative and postive! ) are the following:

1, -120
2, -60
3, -40
4, -30
5, -24
6, -20
8, -15
10, -12
12, -10
15, -8
20, -6
24, -5
30, -4
40, -3
60, -2
120, -1

After looking over all of these factors, we can see that 10 · -12 is equal to not only -120, but when the multiplication sign is replace by addition, it is equal to -2!

Hope this helps.

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Probability for a randomly chosen girl to be senior= $\frac{9}{10+7+10+9}=\frac{9}{36}=\frac{1}{4}$

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Since choosing boys and girls is independent,

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