kaylaa154 kaylaa154
  • 01-02-2019
  • Mathematics
contestada

a line with a slope of -7 passes through the points (u,0) and (8,-7) what is the value of u?

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vamok
vamok vamok
  • 05-02-2019

Answer:

u = 7

Step-by-step explanation:

Using the slope intercept formula:

[tex]\frac{y2 - y1}{x2 - x1}  = slope[/tex]

Substitute our values from the points and the known slope:

[tex]\frac{-7 - 0}{8 - u} = -7[/tex]

Now we multiply both sides by (8 - u) to isolate the x:

(8-u) x [tex]\frac{-7}{8 - u}[/tex] = -7 (8 - u)

Next we add 56 to both sides:

-7 = -56 + 7u

Finish off by dividing both sides by 7:

7u = 49

u = 7

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