7-8. Find the constant of proportionality (unit rate) for each set of values. Then use the constant of proportionality to write an equation that relates the
two values in the table.
7. profit per shirt sold
Shirts (s)
5 10 15
Profit (p) $7.50 $15.00 $22.50
8. Price per pound
Apples (a) 4 5 6
Price (p) $7.96 $9.95 $11.94

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers. a) one of the 400 passengers is selected uniformly at random. let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

I’m stuck on this equation, anyone got the answer?