Two plumbers charge an initial fee and an hourly rate. The equation y = 30x + 100 models plumber A's fee, where y is the total charge and x is the total number of hours worked. Plumber B charges $105 for 1 hour, $160 for 2 hours, and $215 for 3 hours. Which statement about the plumbers' charges is true?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

Diana is painting statues she has 7/8 of a liter of paint each statue requires 1/20 of a liter of paint how many statues can she paint?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance