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3 years ago

By solving a pair of linear equation X + Y is equal to 20 and x-y=10 the value of 'x' and 'y' are

Mathematics

1 answer:

wel3 years ago

7 0

Answer:

x=15, y=5

Step-by-step explanation:

x+y=20

x-y=10

Adding both equations;

(x+x) + (y-y) = 20+10

2x = 30

x = 30/2 = 15

Substitute x=15 into x+y=20

y= 20-x = 20-15= 5

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2 years ago

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Greeley [361]

Answer:

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Step-by-step explanation:

Step 1: Write equation

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3 years ago

Is 42(x + 14y) equivalent to 42x - 56y

g100num [7]

Answer:

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Step-by-step explanation:

When 42(x + 14y) is simplified:

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3 years ago

I need help breaking this down

sergeinik [125]

Answer:

see explanation

Step-by-step explanation:

Given

2cosΘ - $\sqrt{2}$ = 0 ( add $\sqrt{2}$ to both sides )

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cosΘ = $\frac{\sqrt{2} }{2}$

Since cosΘ > 0 then Θ is in first and fourth quadrants, hence

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2 years ago

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Mrs. Hidalgo paid $30 for 4 students to visit an art museum. Find the cost for 20 students.

Bond [772]

Answer:

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Step-by-step explanation:

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Our final answer would be $120

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2 years ago

By solving a pair of linear equation X + Y is equal to 20 and x-y=10 the value of 'x' and 'y' are​

By solving a pair of linear equation X + Y is equal to 20 and x-y=10 the value of 'x' and 'y' are