What percentage of the bill amount should you leave as a tip for a waiter at a dine-in restaurant

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Mr. roseanne will buy 12 1/2 pounds beef for for a cookout. the price for the first 3 pounds of beef is $4.99 per pound. after that, the price is $4.49 per pound. how much will mr.roshan pay for the beef

Ineed ! what is the connection between ratios, fractions, and percents? give an example with your answer.