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klasskru [66]
3 years ago
6

Solve this system of linear equations. separate the x- and y- values with a coma. -12x=-75-11y

Mathematics
1 answer:
ycow [4]3 years ago
4 0
Solve the following system:
{-12 x = -11 y - 75 | (equation 1)
{-5 x = -11 y - 89 | (equation 2)
Express the system in standard form:
{-(12 x) + 11 y = -75 | (equation 1)
{-(5 x) + 11 y = -89 | (equation 2)
Subtract 5/12 × (equation 1) from equation 2:
{-(12 x) + 11 y = -75 | (equation 1)
{0 x+(77 y)/12 = (-231)/4 | (equation 2)
Multiply equation 2 by 12/77:
{-(12 x) + 11 y = -75 | (equation 1)
{0 x+y = -9 | (equation 2)
Subtract 11 × (equation 2) from equation 1:
{-(12 x)+0 y = 24 | (equation 1)
{0 x+y = -9 | (equation 2)

Divide equation 1 by -12:
{x+0 y = -2 | (equation 1)
{0 x+y = -9 | (equation 2)
Collect results:
Answer:  {x = -2                {y = -9

please note that the parentheses "{" should span over both equations but the editor doesn't allow that so I should it on both line, See attached example.










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Mrrafil [7]

Answer:

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Step-by-step explanation:

First you find the equation of the line. Start by finding the slope of the line, using the two points given: (-5,0), (0,-5).

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The y intercept is -5.

Your equation is then y = -1x-5.

To find which inequality to use, plug in a point within your region and see if the statement is true. I would choose (-3,-3)

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