A towing company charges a hook-up fee of $25.00 and
then charges by the mile for the distance towed. Pedro has
his car towed 5 miles and receives a bill for $66.75. What
cost for towing, per mile, after the hook-up has been paid?

Serena is making an experiment. for that, she needs 20 grams of a 52% solution of salt. she has two large bottles of salt water: one with 40% and the other with 70% of salt in them. how much of each must she use to make the solution she needs? i am in need of