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Zielflug [23.3K]
3 years ago
8

X=-4y 3x+2y=20 Substitution

Mathematics
2 answers:
nadezda [96]3 years ago
7 0

Answer: y= -2; x = 8

Step-by-step explanation:

X=-4y.......equation 1

3x+2y=20......equation 2

Substitute the value of x into equation 2

3 (-4y) + 2y = 20

-12y + 2y = 20

-10y = 20

Divide both sides by -10

y = 20/-10

y = -2

Substitute the value of y into equation 1 to get the value of x

x = - 4(-2)

x = 8

I hope this helps greatly, please mark as brainliest answer.

inysia [295]3 years ago
6 0

Answer:

y=-2

x=8

Step-by-step explanation:

Substitute x=-4y into the other equation:

3(-4y)+2y =20

Multiply out the parenthesis:

-12y +2y = 20

-10y =20

Divide on both sides by -10:

y = 20/-10 =-2

Now, knowing y,you can substite it in the previous equation for x:

x = -4(-2)= 8

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-5y + 12 + 8y − 6 − 2 = ______ help plz
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Answer:

(combine like terms)

-5y + 12 + 8y − 6 − 2  

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3 0
3 years ago
Jamar drove 228 miles and used 6 gallons of gas.
Klio2033 [76]

Step-by-step explanation:

a)

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228 miles and 6 gallons.

so, miles/gallon = 228/6 = 38 miles/gallon.

b)

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2 years ago
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2 years ago
A baseball is thrown at an angle of 30° with respect to the ground and it reaches the ground in 2 seconds. What is its initial v
NeTakaya

Answer:

The answer to your question is vo = 19.62 m/s

Step-by-step explanation:

Data

angle = α = 30°

time = t = 2 s

vo = ?

g = 9.81 m/s²

Formula

                  t = \frac{2vosin\alpha}{g}

Solve for vo

             vo = \frac{tg}{2sin\alpha}

Substitution

            vo = \frac{(2)((9.81)}{2sin 30}

Simplification

           vo = \frac{19.62}{2(0.5)}

           vo = \frac{19.62}{1}

Result

            vo = 19.62 m/s

3 0
2 years ago
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