One smartphone plan costs $48 per month for talk and messaging and $8 per gigabyte of data used each month. A second smartphone plan costs $78 per month for talk and messaging and $3 per gigabyte of
data used each month. Let c represent the total cost in dollars and d represent the amount of data used
The system of equations
= 48 +8d
can be used to represent this situation.
C = 78 +3d
in gigabytes
How many gigabytes would have to be used for the plans to cost the same? What would that cost be?
C

-2 is the right

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step-by-step explanation:

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the equation of the parallel line would be y = 2x + 9

step-by-step explanation:

to start we need to find the slope of the original line. we can do that by looking at the coefficient of x, which is 2

since the slope of the original line is 2 and parallel lines have the same slope, we know the new line will also have 2 slope. now we can use that along with the point given in point-slope form to get the find equation.

y - y1 = m(x - x1)

y - 5 = 2(x + 2)

y - 5 = 2x + 4

y = 2x + 9