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3 years ago

What is the y coordinate in the solution for the system of linear equations below

Mathematics

1 answer:

Natali5045456 [20]3 years ago

5 0

Answer:

y=6

Step-by-step explanation:

use elimination by making the ys opposite in value and eliminating them from the equation so there is only variable:

-3x+2y=6

2(4x-y=2)

-3x+2y=6

8x-2y=4

Combine like terms and divide by 5 on both sides.

5x=10

x=2

Plug x in to find y:

4(2)-y=2

8-y=2

y=6

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2 years ago

Solve by substitution: -5x + y = -2 -3x + 6y = -12 please explain

fomenos

First we pick the equation. Let's say we pick first one. From it we express y.

$-5x+y=-2\Longrightarrow y=-2+5x$

Then we use this y and plug it in instead of y in the second equation.

$-3x+6(-2+5x)=-12$

Now just solve for x.

$-3x-12+30x=-12 \\-3x=-30x \\\underline{x=10}$

We plug this x in the first equation.

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And solve for y.

$-50+y=-2 \\\underline{y=48}$

So the solution to the equation is geometrically a point P which lies on the intersection of the two lines.

$\boxed{P(10,48)}$

Hope this helps.

r3t40

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4 years ago

Finding the expression with work ANSWER ASAP PLZ!!!!!!!!!!!!!

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Step-by-step explanation:

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3 years ago

Read 2 more answers

WHAT IS X PLEASE HELP 50 POINTS

Iteru [2.4K]

Answer:

x=52

Step-by-step explanation:

90+34

124

180 (sum of all interior angles) - 124

x+72+56=180 (straight line)

x+128=180

-128 -128

x=52

*replace to verify*

52+72= 124

124+56= 180 (straight line)

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3 years ago