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maksim [4K]
1 year ago
5

(Combining Equations)What is the result of adding these two equations ? 2x + 3y = -5 5x - y = -12

Mathematics
1 answer:
lara [203]1 year ago
3 0

7x +2y =-17 ..... Finally, answer

2x + 3y = -5

+

5x -y = -12

---------------------------

7x +2y = -17

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The ratio of boys to girls in a local choir is 7:10. If there are 35 boys in the choir, how many girls are there?
erica [24]

Answer:

50 girls

Step-by-step explanation:

Given data

We have the ratio as

7:10

The total part = 7+10= 17

let the number of boys and girls be x

applying the part to all method

7/17= 35/x

cross multiply

7x= 35*17

7x=595

x=595/7

x= 85

Hence the number of girls is

=85-35

=50 girls

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2 years ago
Dy/dx when y=x^2e^5x
vekshin1
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