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Mamont248 [21]
4 years ago
9

What is the solution to the following system of linear equations?

Mathematics
1 answer:
Lostsunrise [7]4 years ago
8 0
<span> x − 2y = −1 => x = 2y -1

2x + y = −12
2(2y - 1) + y = -12
4y - 2 + y = -12
5y = -10
y = -2
x = 2</span>·(-2) - 1
x = -4 - 1
x = -5

Answer <span>D (-5,-2)</span>
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What is the cost of constructing a fence 6 and a half feet (6'6") high around a lot measuring 90 ft by 175 ft; if the cost of er
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Based on the given values, I can only assume that the fence forms a rectangular shape. With this, the perimeter of the lot is:

Perimeter of lot = 2 * 90 + 2 * 175

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Perimeter of lot = 530 feet 

Since the cost per linear feet (perimeter) is $1.25, therefore the cost of erecting the fence is:<span>
Cost of erecting fence = $1.25 * 530 </span>

Cost of erecting fence = $662.50 

 

The area of the fence would be equal to the perimeter multiplied by the height:<span>
Area of fence = 530 feet long * 6.5 feet high </span>

Area of fence = 3445 square feet 

Then the cost of materials will be:<span>
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Cost of materials = $2,842.13 

 

Therefore the total cost would be: <span>
<span>Total cost = $662.50 + $2,842.13 </span></span>

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3 0
4 years ago
Evaluate the expression if a = 2, b = −3, c = −4, h = 6, y = 4, and z = −1.
scZoUnD [109]

Step-by-step explanation:

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6 0
3 years ago
I need help with this ASAP
EastWind [94]

Given:

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To find:

The length of subtended arc, i.e., x.

Solution:

The formula for arc length is:

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Putting s=x, r=6, \pi=3.14, \theta =75^\circ in the above formula, we get

x=2(3.14)(6)\times \dfrac{75^\circ}{360^\circ}

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The second one is
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3 years ago
Give the equation of a parallel line to x=3 going thru (2,5)
Vikki [24]

Answer:

y=3x+5

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3 0
3 years ago
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