3 years ago

Solve the system of equations. -x - 3y = 20 -x + 4y = -36

1 answer:

8 0

Multiply the second equation by 1 to make it positive then add them together.
-x-3y=20
+x-4y=36
----------------
-7y=56
y=-8

Plug that into one of the equations above.
-x-3(-8)=20
-x+24=20
-x=20-24
-x=-4
x=4

So x=4 y=-8 or (4,-8)

Hope that helps

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bonufazy [111]

Answer:

y = 2

Step-by-step explanation:

Given

$\frac{2y-1}{15}$ = $\frac{y}{10}$ ( cross- multiply )

10(2y - 1) = 15y ← distribute left side

20y - 10 = 15y ( subtract 15y from both sides )

5y - 10 = 0 ( add 10 to both sides )

5y = 10 ( divide both sides by 5 )

y = 2

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2 years ago

Aaron and noah wanted to have a contest to see which of their paper airplanes could fly the longest distance. Aaron's plane flew

Marina CMI [18]

Aaron's plane flew 3.21 meters further than Noah's plane.

Explanation

Aaron's plane flew 4 meters and Noah's plane flew 79 centimeters.

So, first we need to convert 79 centimeters into meters.

We know that, 1 centimeter = 0.01 meter

So, 79 centimeters = $(0.01*79)meter= 0.79 meter$

Now, the difference of distance between Aaron's plane and Noah's plane is $(4-0.79) meters = 3.21 meters$

3 0

4 years ago

Choose the inequality that represents the following graph.

inysia [295]

Answer:

Step-by-step explanation:

3 0

3 years ago

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Use the distributive property to expand -4 (-2/5 + 3 x). Which is an equivalent expression?

Brrunno [24]

Answer:

8/5-12x.

Step-by-step explanation:

To distribute, you simply need to multiply each of the terms inside of the parenthesis by -4. This will give you:

=-4( $\frac{-2}{5}$ )-4(3x)

=8/5-12x. This is your answer!

7 0

3 years ago

I need help asap :):):)

KiRa [710]

Answer:

24 ÷ 4

Step-by-step explanation:

Putting something into fourths is putting into 4 parts. If you divide 24 by 4 you get 6. 6 equals 1/4 of 24. To check your work add 6 together 4 times.

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3 years ago

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