You sell 3 hamburgers at $2.10 each plus 0.38 tax. a customer gives you a $10.00 bill. how much change does he get?

Find the simple interest earned to the nearest cent for each principal, interest rate, and time 735 7% and two and a half years

Rachel reads 1/5 of the pages of a book plus 12 pages on the first day. on the second day, she reads 1/4 of the remaining pages plus 15 pages. on the third day, she reads 1/3 of the remaining pages plus 18 pages. on the fourth day, she reads the remaining 70 pages. how many total pages are in the book?

The sum of two numbers is 12 and their difference is 18 what are the two numbers