Mathematics
27.10.2020 10:07
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Graph the system of equations. {8x+8y=64 2xβˆ’2y=βˆ’4

Graph the system of equations.

{8x+8y=64
2xβˆ’2y=βˆ’4
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jaeybird9
jaeybird9
4,7(78 marks)

We can use the x- and y-intercepts to graph. The x-intercept of the first equation is 8, and the y-intercept is 8. The x-intercept of the second equation is -2, and the y-intercept is 2.

x-intercepts are where the data crosses the x-axis. At every one of these points, the y-coordinate will be 0; therefore we can substitute 0 for y and solve to get the value of the x-intercept.

For the first equation, we would have

8x+8(0)=64

8x=64.

Divide both sides by 8:

8x/8 = 64/8

x=8.

For the second equation,

2x-2(0)=-4

2x=-4.

Divide both sides by 2:

2x/2 = -4/2

x=-2.

y-intercepts are where the data crosses the y-axis. At every one of these points, the x-coordinate will be 0; therefore we can substitute 0 for x and solve to get the value of the y-intercept.

For the first equation,

8(0)+8y=64

8y=64.

Divide both sides by 8:

8y/8 = 64/8

y=8.

For the second equation,

2(0)-2y=-4

-2y=-4.

Divide both sides by -2:

-2y/-2 = -4/-2

y=2.

Plot these points for both equations and connect them to draw the line.

Step-by-step explanation:

roperbailey
roperbailey
4,5(95 marks)
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