PLEASE HELPP IM BEGGING I REALLY NEED HELP HELP HELP HELP HELP HELP HELL ITS 6TH GRADE MATH CMON PLEAE HELP

Two customers went to a post office. first customer paid $12 for 14 and 5 envelopes the second paid 24.80 for 10 postcards and 15 envelopes. what is cost of each envelope?

The art class is planning to paint a mural on an outside wall. this figure is a scale drawing of the wall. width: 11 in length: 28 in unit rate: 1.5 ft per in. write the ratio of the area of the drawing to the area of the actual mural. write your answer as a unit rate. show that this unit rate is equal to the square of the unit rate 1.5 ft per in

Justin has 750 more than eva and eva has 12 less than justin together they have a total of 63 how much money did