A group of students is planning a trip using cars and minibuses. Each car can hold 5 students and each minibus can hold 13 students. There are 64 students on the trip.

43

step-by-step explanation:

abby has a greater debt becasue she owea 5 more then alan does

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x