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NISA [10]
3 years ago
5

What is the solution to the system of equations? Use any method you like, but be sure to show all work.

Mathematics
1 answer:
jeka57 [31]3 years ago
3 0
These are known as simultaneous equations,,
2x + y= -3 take this as 1st equation
x-2y=-4 take this as 2 nd equation

therefore x - 2y= -2 should be multiplied by 2 inorder to cut off 2x and 2x from the first and second equations.

by multiplying we get 2x - 4y = -4

therefore 3rd equation should be substracted from 1st equation...

now, 2x -4y - 2x -y = -4-(-3)

therefore, -2x and +2x is cut.

as a result -5y= -1

therefore y = 1 /5

then let us find x

2x + y = -3
::: 2x + 1/5= -3
therefore 2x= -3-1/5

finally, x= -16/5÷2
then x= 8/5

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NARA [144]

Answer:

D. 2y^2+11y-10.

Step-by-step explanation:

Given:

We need to reduce 7y+2y^2-7 by 3-4y

Solution:

To reduce the equation means we need to subtract the one equation from other.

First we will arrange the equation n proper format we get;

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Now we will subtract equation 2 from equation 1 we get;

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Now Applying distributive property for the sign we get;

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7 0
3 years ago
If x +2y=1 and x-y=2 find the value of 2y + x ​
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1

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3 0
3 years ago
A museum sells postcards of famous paintings. The postcards must be the same shape as the painting.
denis-greek [22]
C is the correct shape.

Explanation:

The ratio of the sides must be the same for the postcard and the painting. The painting has a ratio of 30.25 to 25.25. If you simplify this and divide both sides by 5, you get 6.05 to 5.05, which matches C.

Hope that helps!

-Grace
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4 years ago
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