Calculate the tip. total: $ 82.33 tip: 20%​

What is 140% of 25? because i need

Solving algebraic equations 2m+3=11

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