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4 years ago

15

What is the solution to the system of equations? Use the substitution method to solve. 6=−4x+y−5x−y=21 Enter your answer in the

boxes.

1 answer:

miss Akunina [59]4 years ago

5 0

Answer:

x=-3 and y= -6

Step-by-step explanation:

we have

6=-4x+y and -5x-y = 21

6+4x=y we substitute y in the second equation

-5x-(6+4x)=21

-9x-6=21

-9x=27

x=-3

we substiture x in the second

-5(-3)-y =21

15-y=21

15-21=y

y=-6

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Simplify the sum. (7u3 + 4u2 + 7) + (7u3 – 6u + 4)

andreyandreev [35.5K]

Answer:

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Step-by-step explanation:

The question is to simplify $(7u^{3}+4u^{2}+7)+(7u^{3}-6u+4)$

<em>We combine like terms, as in, combine cubes with cubes, squares with squares, numbers with numbers and so on.</em>

There are 2 cubed terms, so they should be combined.
There are 2 numbers, so they should be combined.
Others, leave as is.

So we have:

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3 years ago

An observatory is shaped like a cylinder standing on one of its bases with a dome on top. The

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Step-by-step explanation:

we know that

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3 years ago

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Elanso [62]

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