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Alekssandra [29.7K]
3 years ago
15

Solve the following system of equations algebraically: x2 + y2 = 20 2y = x

Mathematics
1 answer:
MaRussiya [10]3 years ago
4 0

Answer:

x = 5

Step-by-step explanation:

x2 + y2 = 20

xy = 20 ÷ 2 ÷2

= 10 ÷ 2

x = 5

i dont know whether this is right

but hope it helps n it works

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In a school 40% are boys and 900 are girls. find the total number of students of the school and the number of boys
My name is Ann [436]

Answer:

1500 students

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Step-by-step explanation:

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900 / 60% = x / 100%

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4 years ago
Find the center and radius of the circle whose equation is x 2 + y 2 + 10x − 1
Margaret [11]

we conclude that the center of the circle is the point (-5, 0).

<h3>How to find the center of the circle equation?</h3>

The equation of a circle with a center (a, b) and a radius R is given by:

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x^2 + y^2 + 10x - 1 = 0

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x^2 + 10x + y^2 = 1

Now we can add and subtract 25 to get:

x^2 + 10x + 25 - 25 + y^2 = 1\\\\(x + 5)^2 -25 + y^2 = 1\\\\(x + 5)^2 + (y - 0)^2 = 26

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If you want to learn more about circles:

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3 0
2 years ago
Farmer McCoy can plant either corn or soybeans. The probabilities that the next harvest prices will go up, stay the same, or go
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Answer:

McCoy should plant soybeans

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Let the two crops be corn and soybeans as indicated.

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Step-by-step explanation:

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Answer:

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4 years ago
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