Janitor A can clean all the classrooms at Strawberry School in 8 hours. Janitor B can clean the same classrooms in 10 hours. How long would it take Janitor A and Janitor B

working together, to clean all the classrooms?

1. What is the solution to the system? [1] x + 2y+3z=6 [2] y+2z=0 [3] z=2 a. (10, 0, 2) b. (8, - 4, 2) c. (6, 0, 2) d. (-8, 4, 2)

How many sides does a regular heptagon have

Irene paid $40 more of her cell phone bill in July then in June and August she paid $10 less than her June bill if she paid a total of 120 for her cell phone bill for all three months how much did she pay for her August Bill

One of the parallel sides of a trapezium is 5cm longer than the other. If the prependicular distance between them is 9cm and area is 126cm 2 , find the length of the parallel sides.

A hose is filling a water tank at the rate of 70 gallons per minute. A loose drain plug causes 4 gallons per minute to drain out. How many minutes does it take to fill a tank with a capacity of 3960 gallons?

5x + 2 = 7 y = x + 1 what is the solution set of the given system?

The area of the rectangular floor in Tamara's room is 9556 square feet. The width of the room is 813 feet. Part A Round each measurement to the nearest whole number to estimate the length of Tamara's room. Enter your answer in the box.

A spring is oscillating so that its length is a sinusoidal function of time. Its length varies from a minimum of 10 cm to a maximum of 14 cm. At t=0 seconds, the length of the spring was 12 cm, and it was decreasing in length.

Barry Olson just purchased 800 shares of an electronics corporation stock at $42.17 per share. His online broker charged him $10.00 commission. What was the total cost of the stock? Show work. A) 22,489 B) 33, 579 C) 42, 458 D) 33, 746

What fraction of an hour is 54 minutes