Jane is collecting stamps. he has 57 pages of stamps with an average of 30 stamps per page. if the average selling price of each stamp is $.35, about how much are his stamps worth?

Determine whether the quadrilateral below is a parallelogram. justify/explain your answer (this means back it up! give specific information that supports your decision. writing just "yes" or "no" will result in no credit.)

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?