Kaylie buys a sweater on sale for $40.11. If the discount is 20% off and she pays $1.91 in sales tax, what is the original price of the sweater?

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

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m

Keith runs 5 miles in 38 minutes. at the same rate, how many miles would he run in 57 minutes