3 years ago

Solve the system of linear equations by substitution.

Mathematics

1 answer:

Bezzdna [24]3 years ago

3 0

For this you need to solve by elmination

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-18 + x -4x + 5 + -64

LiRa [457]

Answer:

= -80

Step-by-step explanation:

-77+-3x

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3 years ago

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timurjin [86]

(15^3)^3

the rest are equal to 15^6:)

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2 years ago

Someone PLEASE HELP ME<br><br>Find the slope of the line <br><br>Algebra 1

olasank [31]

Answer:

Step-by-step explanation:

using rise over run method, from (0,20) to (1,80) the line slants up by degree of 60 per one unit so the slope is 60.

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3 years ago

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A backyard pool has a concrete walkway around it that is 3 feet wide on all sides. The total area of the pool and the walkway is

Sloan [31]

Answer:

$x \approx 21.080\,ft$ , $y = 29.080\,ft$

Step-by-step explanation:

The total area of the pool and the walkway is:

$(x + 6\,ft)\cdot (y + 6\,ft) = 950\,ft^{2}$

$(x + 6\,ft)\cdot (x + 14\,ft) = 950\,ft^{2}$

$x^{2} + 20\cdot x + 84\,ft^{2} = 950\,ft^{2}$

$x^{2} + 20\cdot x - 866\,ft^{2} = 0$

The roots of the second-order polynomial is:

$x_{1} \approx 21.080\,ft$ and $x_{2} \approx -41.081\,ft$

The only possible root is:

$x \approx 21.080\,ft$

The other dimension of the pool is:

$y = x + 8\,ft$

$y = 21.080\,ft + 8\,ft$

$y = 29.080\,ft$

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3 years ago

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Zarrin [17]

Answer:

C. 3 a ^2 b^11 /2

Step-by-step explanation:

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2 years ago

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