PLEASE PLEASE HELP I WILL GIVE BRAINALIST AND EXTRA POINTS

Step-by-step explanation:

1)  phone

38.95 = 0.03 * mins + 29.95

9.00 = 0.03 * mins

9.00 /0.03 = mins

300 = mins

so he used 300 minutes  :)

2) books

8.70 =14 * bookPrice + 2.40

6.30 = 14 * bookPrice

6.30 / 14 = bookPrice

0.45 = bookPrice

each book cost 45 cents  :)

step-by-step explanation:

i think something is missing in your question because y-1=(x-12) would not pass through the point (-4,-3). because if you replace x by -4 your are supposed to find y=-3 which is not the case her. if you replace x by -4 you find =-15.

i assume the right equation is y-1=1/4*(x-12) because this one is passing through both your points (if you are interested to know how i found that out i can tell you).

in this equation if i replace x by -4 i find y=-3 and if i replace x by 12, i find y=1 so the line representing this equation is passing through those 2 points.

then the standard form of the equation is finding an expression of y in function of x

y-1=1/4*(x-12)

y=x/4-3+1

y=x/4-2

hope that .

do you confirm there was a mistake in the question?