Afish tank has 9 goldfish, 7 tetras, 4 snails, and 3 platies. what is the ratio of tetras to platies?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Melissa is purchasing a $160,000 home and her bank is offering her a 30-year mortgage at a 4.9% interest rate. in order to lower her monthly payment, melissa will make a 20% down payment and will purchase 3 points. what will her monthly mortgage payment be? a. $645.98 b. $650.46 c. $662.93 d. $606.69

A+b= 17, ab=70, find the value of |a-b|