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3 years ago

Solve the system of equations x - y = 12 and x + 7y = -20 by combining the equations.

Mathematics

2 answers:

svetoff [14.1K]3 years ago

8 0

Answer:

x= 8, y= -4

Step-by-step explanation:

You can subtract one equation by another to eliminate x

(x-y)-(x+7y)=12-(-20)

-8y = 32

y= -4

Substitute y = -4 in the first equation:

x-(-4) = 12

x =8

iogann1982 [59]3 years ago

7 0

Answer:

x=16, y=-4

Step-by-step explanation:

-1(x-y=12)

x+7y=-20

-x+y=-12

x+7y=-20

8y=-32

y=-4

x-4=12

x=16

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3 years ago

Determine whether the improper integral converges or diverges, and find the value of each that converges.

Ksju [112]

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Step-by-step explanation:

Given

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fomenos

2/3 would be the value of this expression:)

4 0

3 years ago

Al's Produce Stand sells 8 ears of corn for $2.25. Barbara's Produce Stand sells 12 ears of corn for $3.50. Write two equations,

Gennadij [26K]

Answer:

6n = 1.50

and

13n = 3.12

Step-by-step explanation:

Here in this question, we are interested in writing equations that relate the number of ears of corn sold and the cost.For Al’s produce stand, let the price per corn sold be n

Thus;

6 * n = 1.50

6n = $1.50 •••••••(i)

For the second;

let the price per corn sold be n;

13 * n = $3.12

-> 13n = 3.12 •••••••••(ii)

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2 years ago