A basic cellular package costs $20 per month for 60 minutes of calling, with an additional charge of $0.30 per minute beyond that time. The cost formula would be C = $20 + $0.30(x - 60). If you have to keep your bill lower than $50, what is the maximum calling minutes you can use?

160 minutes

Step-by-step explanation:

I'm not sure what x is.

I think total time to call is x

So, we have: $20 + $0.30(x - 60) < $50

=> (x-60) < 100

=> x<160

my guess would be b and d, but i didn’t actually get out the pen and paper. lol

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