Hardware store sells a 5 pound box of nails for $16.80. the store is having a 20% off sale on all merchandise. what is the sale price of one 5 pound box of nails.

(note i put the graph in so plz )the graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel. what is the slope of the line

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

∆red ≅ ∆ by rule will give brainiest if possible