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Zanzabum
3 years ago
5

I need help with #1-3

Mathematics
1 answer:
USPshnik [31]3 years ago
4 0
1:
2x-y=7
Subtract 2x from both sides and you get:
-y=-2x+7
Divide both sides by negative 1
y=2x-7

2:
\frac{1}{4} x + y =  -  \frac{ 2}{7}
Minus
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If x+y=9, and 8(x+3y)= 120, what is the value of x-y
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Answer:

3

Explanation:

Apply Multiplicative Distribution Law:

{x + y =9

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Reduce the greatest common factor on both sides of the equation.

{x + y = 9

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Subtract the two equations: x + y - (x +3y) = 9 - 15

Remove paranthesis: x + y - x - 3y = 9 - 15

Cancel the unknown variables: y - 3y = 9 - 15

Combine like terms: -2y=9 - 15

Calculate the sum or difference: -2y = -6

Reduce the greatest common factor on both sides of the equation: y =3

Substitute one unknown quantity into the elimination: x + 3 = 9

Rearrange unknown terms to the left side of the equation: x = 9 - 3

Calculate the sum or difference: x = 6

Write the solution set of equations: {x = 6

                                                           {y = 3

Substitute: 6 - 3

Calculate the sum or difference: 3

Answer: 3

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3 years ago
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svetlana [45]

Answer:

B. because A and B cannot occur at the same time.

Step-by-step explanation:

If two events are mutually​ exclusive, why is ​? Choose the correct answer below.

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A rectangular prism has a volume of 1,500
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Step-by-step explanation:

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A carpet layer is given a roll of carpet which has already been cut for a 12-ft. wall. The wall measures 1.5 in. on a drawing. T
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Step-by-step explanation:

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