A college student earned $246, $288, $234, and $ 276 over a four week period. How much he earn during the fifth week to have average earnings of $255 for the five weeks?
[tex] \frac{246 + 288 + 234 + 276 + x}{5} = 255[/tex] If we multiply both sides by 5 we get [tex]246 + 288 + 234 + 276 + x = 1275[/tex] Now if we add our like terms, we get [tex]1044 + x = 1275[/tex] Now lets subtract 1044 from both sides to get a value for x [tex]x = 231[/tex]
