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4 years ago

I MESSED UP BEFORE BUT 14 POINTS HELP PLZ

Mathematics

2 answers:

FromTheMoon [43]4 years ago

7 0

Answer:

The mistake was dividing by 2 when he should have divided by -2!

Step-by-step explanation:

x=-4

pogonyaev4 years ago

4 0

It’s -4
Because -2x=8
-x=8/2
-x=4
X=-4

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Help!! Please please answer quickly and in the next 9 hours! <br><br> Solve these questions.

lutik1710 [3]

Answer:

Please refer to step-by-step.

Step-by-step explanation:

Let's solve all of these one at a time.

15. -2x - y = -5

To find the x-intercept, we need to equate the value of y to 0.

-2x - 0 = -5

$\dfrac{-2x}{-2}=\dfrac{-5}{-2}$

$x=2.5$

To find the y-intercept, we need to equate the value of x to 0.

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-y = 2x - 5

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y = -2x + 5

16. 6x + 3y = -9

Let's start with the x-intercept.

6x + 3y = -9

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Now we solve for the y-intercept.

6x + 3y = -9

6(0) + 3y = -9

$\dfrac{3y}{3}=\dfrac{-9}{3}$

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3y = -6x - 9

Now we need to divide all our variables by 3 to get y.

$\dfrac{3y}{3}=\dfrac{-6x}{3}-\dfrac{9}{3}$

$y=-2x-3$

17. x - y = 4

Let's start with the x-intercept.

x - y = 4

x - 0 = 4

$x=4$

Now we solve for the y-intercept.

x - y = 4

0 - y = 4

-y=4

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x - y = 4

-y = -x + 4

We need to divide all our variables by -1 to get y.

$\dfrac{-y}{-1}=\dfrac{-x}{-1}+\dfrac{4}{-1}$

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Let's start with the x-intercept.

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