2 years ago

**Solve by Elimination 3 + 2x - y = 0 -3-7y = 10x 7) x = 8) y =

1 answer:

7 0

Answer:

Explanation:

3 + 2x - y = 0
Or 2x - y = -3 (1)

-3-7y = 10x
Or -10x - 7y = 3 (2)

2x - y = -3 (1)
-10x - 7y = 3 (2)
———————

Multiply 5 to (1)

5(2x - y = -3)
-10x - 7y = 3
———————
10x - 5y = -15
-10x - 7y = 3
———————
-12y = -12
y = -12/-12
y = 1

Plug y value in (1)

2x - 1 = -3
2x = -3 + 1
2x = -2
x = -2/2 = -1

Therefore, x = -1 and y = 1

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Determine whether (7,9) is a solution of 7x+2y= −7.

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We can check by subbing in the values.

7x + 2y = -7
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now we sub
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3 years ago

The cost of tuition at a college is $12,000 and is increasing at a rate of 6% per year; 4 years.

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Step-by-step explanation:

I = P • r • t

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3 years ago

Find the Least Common Multiple of 26 and 38.

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Answer:

494

Step-by-step explanation:

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3 years ago

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Step-by-step explanation:

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2 years ago

Solve the following equation for N 1/5 (N+3)+4=3/10 (2N-2) n = ________

postnew [5]

Answer:

n = 13

Step-by-step explanation:

1/5(n + 3) + 4 = 3/10(2n - 2)

~Simplify both sides

1/5n + 3/5 + 4 = 3/5n - 3/5

~Combine like terms

1/5n + 23/5 = 3/5n - 3/5

~Subtract 23/5 to both sides

1/5n = 3/5n - 26/5

~Multiply 5 to both sides

n = 3n - 26

~Subtract 3n to both sides

-2n = -26

~Divide -2 to both sides

n = 13

Best of Luck!

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3 years ago