IMPORTANT GUYS please help

x=3,y=7

Step-by-step explanation:

8x+3y=45

2x+3y=27

8x-2x=6x

45-27=18

6x=18

6. 6

x=3

2x+3y=27

2(3)+3y=27

6+3y=27

3y=27-6

3y = 21

3. 3

y=7

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4

well, because the $0.25 is an added cost depending on how many minutes, the answer would be y = 30 + 0.25x.