math
posted by Anonymous .
the value, v, of a shopkeepers inventory software program is given by v= (1)/(3)t+5 where t is the number of years since the shopkeeper bought the program. What is the program worth 9 years after its first year purchased? Plot the point with the given tvalue, 9.
after 9 years the program is worth $2
After how many years is the value of the software $3?

Substitute $3 for v to get
3=(1/3)t+5
Solve for t.