The Robinson family and the Gonzales family each used their sprinklers last summer. The water output rate for the Robinson family's sprinkler was 15 L per hour. The water output rate for the Gonzales family's sprinkler was 30 L per hour. The families used their sprinklers for a combined total of 65 hours, resulting in a total water output of 1425 L . How long was each sprinkler used?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?

Mason and christian go to the movie theater and purchase refreshments for their friends. mason spends a total of $45.75 on 3 bags of popcorn and 6 drinks. christian spends a total of $71.50 on 6 bags of popcorn and 4 drinks. write a system of equations that can be used to find the price of one bag of popcorn and the price of one drink. using these equations, determine and state the price of a drink, to the nearest cent.

Robert has 78 tomato lants and 56 cucumber plants .he wants to plant them in rows that only have one type of plant in each row with the same number of plants in each row. how many plants should he put in each row and how many rows of each type of plant will he need