Sic store bought a CD set at a cost of ​$. When the store sold the CD​ set, the percent markup was ​%. Find the selling price. The selling price was

Ineed if you could explain and give me the answer you! this needs done

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

Will mark brainliest for correct answer! i have been on this problem for an hour and can't find the answer. i'm begging here! incase you cant read the instructions in the picture because of too much or too little lighting: note: enter your answer and show all the steps that you use to solve this problem in the space provided.write a list of steps that are needed to find the measure of b. provide all steps as clear as possible, !