In a school, the ratio of the number of pupils to the number of teachers is 20:1. If the number of pupils is 840, how many teachers are there?

Solve the system using elimination. 3x - 4y = 9 -3x + 2y = 9 (-27, - 9) (3, 9) (-3, - 6) (-9, - 9)

Which function represents an initial population that increases 22% per year where A represents the initial value and x represents time in years? A) y=A (0.22) ^x B) y=A (0.68) ^x C) y=A (1.22) ^x D) A (1.68) ^x

Determine the sum of the first 20 terms of an arithmetic series with an initial term of 3 and a common difference of 2.

How many fights are there in 3?

What is the definition of solving addition equations?

If you roll a single fair die and count the number of dots on top, what is the probability of getting an even number or a 5 on a single throw?

Each chicken eats about 6 pounds of chicken feed in a month. how many pounds of chicken feed will be left after 3 months? Write and explain equations to show the steps in your solution. 300 pounds of chicken feed for 16 chickens

It takes 40 minutes to fill a water tank, and 60 minutes to drain it. How many hours will it take to fill the tank while draining it the entire time?

Tanya stores her coins in a cylindrical container. The container has a diameter of 8 inches and a height of 15 inches. Which is the volume of Tanya's container to the nearest cubic inch?

Scarlett selects a card at random from a deck that contains 18 red, 12 yellow, and 20 blue cards. What is the probability that she does not select a red card?