Evaluate the expression −11−(−7−9) by rewriting the subtraction as addition.

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Can someone answer this question for me