Question 553505
c=20t +30


If t=8, then
c=20(8) + 30
c=160+ 30
c=$190 for 8 months


If c=$90 available
C=20t + 30
90=20t + 30
20t + 30 = 90


Subtract 30 from each side:
20t = 60
Divide both sides by 20
{{{(20t)/20=60/20}}}
{{{t=3}}} Months


Graph c= 30t+20

{{{graph(300,300,-4,12,-20,400, 30x+20)}}}


Happy New Year!! My Email address is rapaljer@seminolestate.edu if you need to contact me!! 


Dr. Robert J. Rapalje, Retired
Seminole State College of Florida
Altamonte Springs Campus 



Divide both sides by 20
{{{(20t)/20=60/20}}}
{{{t=3}}} Months