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KIM [24]
3 years ago
5

The ratio of the weight of Jennifer to that of her friend Laura is 6:11. Laura goes on a diet and loses 12kg and now the ratio o

f their weights is 6:7. How much does Laura weigh now?
Mathematics
1 answer:
Inessa05 [86]3 years ago
3 0

Answer:

21kg

Step-by-step explanation:

We will do this.

11x - 12 = 7x

11x - 4x = 7x

4x = 12

4x/4 = 12/4

x = 3

3 x 7 = 21

Laura weighs 21 kg.

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A2+5a+6=0<br><img src="https://tex.z-dn.net/?f=%20%7Ba%7D%5E%7B2%7D%20%20%2B%205a%20%2B%206%20%3D%200" id="TexFormula1" title="
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we are given

a^2+5a+6=0

we can use factoring formula

a^2-(m+n)a+mn=(a-m)(a-n)

we can compare

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m+n=-5

mn=6

now, we can solve for m and n

and we get

m=-3 , n=-2

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a^2+5a+6=(a+3)(a+2)

now, we can set it equal to 0

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a=-2,a=-3.............Answer

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