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Kay [80]
3 years ago
11

-6x+4y=-4 -6x+2y= 4 solve for x and y

Mathematics
1 answer:
jeyben [28]3 years ago
8 0

Answer:

Step-by-step explanation:

hello :  -6x+4y=-4....(*)

          -6x+2y= 4...(**)

by (*) : -6x= -4y-4

by(**) : -6x = -2y+4

so :   -4y-4=-2y+4

     -2y = 8

y=-4

put this value in (*) : -6x+4(-4)= - 4

-6x=16-4=12

x=-2

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The points (4, -11) and (8, r) lie on a line with slope 2. Find the missing coordinate r.
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Answer:

The answer to your question is r = -3

Step-by-step explanation:

Data

A (4, -11)

B (8, r)

slope = m = 2

r = ?

Process

1.- Use the slope equation to find the coordinate r.

Formula

               m = \frac{y2 - y1}{x2 - x1}

Substitution

        m = \frac{r + 11}{8 - 4} = 2

2.- Simplify

                \frac{r + 11}{4} = 2

3.- Solve for r

Multiply both sides by 4

               \frac{4(r + 11)}{4} = 2(4)

Simplify

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Subtract 11 in both sides

                r + 11 - 11 = 8 - 11

Simplify

                r = -3

       

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