Question 1030057
Call the number of jerseys, x.
Then Uniforms R Us charges $50 apiece.
The other company charges $40x + $80.
We want to know when the average charge of the Jerseys Unlimited is less than $50.  So we write
{{{(40x + 80)/x < 50}}}
Now multiply by x and solve...we get
40x + 80 < 50x
80 < 10x
x > 8 jerseys
Thus we must buy at least 9 jerseys for it to be the better buy.