It takes Carter 28 minutes to mow two lawns. Assuming the lawns are the same size and Carter works at the same speed, how long will it take him to mow five lawns?

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Can someone explain to me how to do

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.