John can run a mile in 8 minutes. If he ran for an hour and 4 minutes how many miles did he run?

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.