Solve the system of linear equations by graphing.
y = –x – 7
x + 2y = 4
what is the solution to the system of linear equations?
(–4.5, 4.25)
(–1.7, –2.8)
(0, –7)
(3, 0.5)

For this case we have the following system of equations:

Substituting the first equation in the second one we have:

We find the value of y:

Thus, the solution of the system is:

(-18,11)

(-18,11)

(-18,11)

Step-by-step explanation:

Find the x-intercept of the first equation by substituting and solving for "x":

Find the y-intercept of the first equation by substituting and solving for "y":

Graph the line passing through the points (-7,0) and (0,-7)

Find the x-intercept of the second equation by substituting and solving for "x":

Find the y-intercept of the second equation by substituting and solving for "y":

Graph the line passing through the points (4,0) and (0,2)

You can observe in the graph that the point of intersection of the lines is:

(-18,11)

This is the solution of the system of equations.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p