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Pavel [41]
3 years ago
10

Solve this system of linear equations. Separate the x- and y- values with a comma. 8x + 2y =-42 4x + 7y=-3

Mathematics
1 answer:
gavmur [86]3 years ago
7 0
<h3><u>The value of x is equal to -6.</u></h3><h3><u>The value of y is equal to 3.</u></h3>

8x + 2y = -42

4x + 7y = -3

In the first equation, subtract 8x from both sides.

2y = -42 - 8x

Divide all terms by 2.

y = -21 - 4x

Now that we have a value of y, we can plug it into the second equation to solve for x.

4x + 7(-21 - 4x) = -3

Distributive property.

4x - 147 - 28x = -3

Combine like terms.

-24x - 147 = -3

Add 147 to both sides.

-24x = 144

Divide both sides by -24.

x = -6

Now that we have a true value for x, we can plug it into either equation to solve for y.

8(-6) + 2y = -42

-48 + 2y = -42

Add 48 to both sides.

2y = 6

Divide both sides by 2.

y = 3

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Jody walks at a faster rate because it would take Amir 30 minutes to walk a mile and Jody approximately 26.6 minutes to walk a mile.

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2 years ago
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I need help don’t understand
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What is -3y+12=-48? Ueuehehhsh
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-12

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48-12= 36

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3 years ago
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Solve the system using the substituiton method<br> branliest offered<br> 3x-7y=10<br> x-4y=5
fiasKO [112]
Hi there!

To solve this problem using substitution, we need to set x equal to a value and substitute it into the other equation.

Since
x - 4y = 5,
x = 5 + 4y

3x - 7y = 10
3(5 + 4y) - 7y = 10
15 + 12y - 7y = 10
15 + 5y = 10
5y = -5
y = -1

Now that we know y is -1, we can substitute it back into the equation to find x:

y = -1
x - 4y = 5
x - 4(-1) = 5
x - (-4) = 5
x + 4 = 5
x = 1

So, your answers are x = 1 and y = -1.

Hope this helps!
6 0
3 years ago
A nurse opens a case that has a total of 160 ounces of med. If each vial in the case holds 1 1/3oz of medication how many vials
uysha [10]

Answer:

120 Vials

Step-by-step explanation:

160/1and1/3

160/4over3

Multiply top by 3

480/4

120

4 0
1 year ago
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