A cell phone company offers its customers two monthly plans. Plan A costs $20 per month plus $0.15 for each minute used. Plan B costs $15 per month plus $0.20 for each minute used.
Part A
Write equations to represent the cost of each plan.
Plan A
Plan B
Part B
Graph the equations
Part C
For how many minutes is the cost the same?
Show your work.

d

step-by-step explanation:

step-by-step explanation:

given that there are two triangles j'k'l' and jkl>

the former is got by dilating the second one.

when drawn on a grid, (graph paper) coordinates of vertices of first triangle is

(6,12)j, (9,6)k and (12,9)l

side jk has length = distance between j and k

=

side j'k'=distance between j' and k'

=

ie j'k'l' has sides 1/3 of that of corresponding sides of jkl.

hence scale factor of 1/3 is used to get j'k'l'from jkl