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3 years ago

2x - 1y = -9 y = -5 - 5x please explain the answer and not just tell me the answer?

1 answer:

6 0

X=-2 y=5

Explanation: your first step would be substitute the equation (y=-5x-5 in for the y in the other equation 2x-1y=-9 making it 2x-1(-5x-5)=-9 then do the distributive property to get 2x+5x+5=-9 then combine like terms and get 7x+5=-9 then you subtract 5 from -9 and get -14 then you get 7x=-14 then get a final answer of x=-2. Then plug in x=-2 to your first equation y=-5(-2)-5 and then you get 10 -5 and get y=5

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3 years ago

Find an equation of the plane. The plane that passes through the line of intersection of the planes x − z = 3 and y + 2z = 3 and

IgorLugansk [536]

Answer:

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Step-by-step explanation:

Choose two common points on the line of intersection of the planes x − z = 3 and y + 2z = 3:

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Thus,

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4 0

4 years ago

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blondinia [14]

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5 0

4 years ago

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Answer:

Step-by-step explanation:

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4 years ago

An outdoor ice skating arena is in the shape of a circle with a diameter of 42 feet. Which of the following is closest to the ar

ioda

Answer:

Step-by-step explanation:

Since the outdoor ice skating arena is in the shape of a circle, we would determine its area by applying the formula for determining the area of a circle which is expressed as

Area = πr²

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π is a constant whose value is 3.14

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From the information given,

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Rounding up to the nearest whole number, area of the outdoor ice skating arena would be 1385 square feet

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3 years ago