Jake is comparing the prices of two laundry service companies . company a charges $20 per load and an additional $8 as service charges . company b charges $24 per load and an additional $4 as service charges .

part a: write equations to represent company a's and company b's total laundry charges for a certain number of loads. define the variable used in the equations

part b: which company would charge less for 5 seconds of laundry ?

part c: how much money is saved by using the services of company a instead of company b to clean 9 loads of laundry