Question

In 1997 there were 31 laptop computers at grove high school. starting in 1998 the school bought 20 more laptop computers at the end of each year. the equation t=20x 31 can be used to determine t, the total number of laptop computers at the school x years after 1997. what was the total number of laptop computers at grove high school at the end of 2005?

Answer 1

We have equation:
t=20x+31
x is number of years after 1997.

To calculate number of laptops in 2005:
x=2005-1997
x=8

t=20*8+31
t=160+31
t=191

In year 2005 school had 191 laptops.