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katrin [286]
3 years ago
7

What is the solution to the system of equation?

Mathematics
1 answer:
dangina [55]3 years ago
3 0

Both equations are set equal to y.  Set them equal to each other now:

y = -2x - 4

y = 2x + 4

-2x - 4 = 2x + 4

Now we solve by isolating x.  Subtract 2x from both sides:

-2x - 4 = 2x + 4

-4x - 4 = 4

And add 4 to both sides:

-4x - 4 = 4

-4x = 8

Now divide both sides by -4:

-4x = 8

x = -2

Now we substitute x into one of the original equations and simplify:

y = 2x + 4

y = 2(-2) + 4

y = -4 + 4

y = 0

So our solution:

(-2, 0)

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Answer:

Step-by-step explanation:

Perimeter of a garden =  2(L+W)

Area of the gerden = LW

L is the length

W is the width

Given

Perimeter = 155ft

Area = 1400ft²

Substitute

1400 = LW

155 = 2L+2W

from 1;

W = 1400/L

Substitute into 2;

155 = 2L + 2(1400/L)

155 = 2L + 2800/L

155L = 2L² + 2800

2L²-155L + 2800 = 0

Factorize

L = 155±√155²-4(2)(2800)/4

L = 155±√24025-22400/4

L = 155±√1625/4

L = L = 155±40.31/4

L = 194.31/4

L = 48.82 feet and;

L = 155-40.31/4

L = 28.67ft

Hence the approximate length of the garden is at least 28.67 feet and at most 48.82 feet.

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That causes loss of money

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Answer:

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Step-by-step explanation:

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