suppose we want to choose 2 letters without replacement, from the 4 letters A, B,C, and D (a) how many ways can this be done, if the order of the choices matters? (b) how many ways can this be done if the order of the choices does not matter?

Ill mark the brainliest if you me with the these three questions 7,8,9

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

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