3 years ago

Solve the system of equations by using substitution. y = –2x – 3 x + y = 9

Mathematics

1 answer:

Nesterboy [21]3 years ago

7 0

Step-by-step explanation:

x-2x-3=9

-x=9+3

-x=12

x=12/-1

x=-12

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Enter an expression which would represent the simplified form of 4x + 8 subtracted from 2x - 10?

Ksju [112]

Answer:

2x - 2

Step-by-step explanation:

Move the numbers to be near their mates

4x - 2x + 8 - 10

Then solve as much as you can

4x - 2 = 2x, 8 - 10 = -2

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3 years ago

One angle within a triangle is 76 degrees. What is the value of the exterior angle?

mrs_skeptik [129]

Answer:

The value of the exterior angle is $104\°$

Step-by-step explanation:

we know that

The sum of the interior angle plus the exterior angle is equal to $180\°$ , because are supplementary angles.

Let

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Answer:

"2 units" is the answer.

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D is the correct a answer

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Write the expression in factored form. 81m^2-49

ivolga24 [154]

We can use the difference of two squares, which is:

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