There are 450 students, 20 teachers and 5 teacher's aides at Canyon Hills Middle School. What is the ratio of students to teachers and their aides?

A

9:2

B

90:1

C

1:18

D

18:1

Richard buys one tooth cleaning kit for $25 and a toothbrush for $15. He spends the rest of his money on body soap. He has $80 at the start. Each body soap is $5. How many can he buy?

If 5 school buses arrive, each carring exactly 42 passengers, which expression would you use to show how many people in all arrived on the school buses

Working together, Rocco and Giulia can paint a room in 3 hours. It would have taken Rocco 7 hours to do the job alone. Which equation can be used to determine r, Giulia's rate of work in parts per hour? + 3r = 7 + 3r = 1 = r = 3r

Hank has cards that are 8 inches by 4 inches. a stack of these cards fits inside a Box that is 8 inches long 4 inches deep 4 inches high.

Add (7x2 - 3x) + (5x - 6). O A. 7x2 + 8x - 6 O B. 4x2 - x O O c. 7x2 + 2x - 6 D. 7x2 - 2x - 6

What variable is isolated

jeff bungee from a 8 story building. each story was 15 4/5 feet in height? how tall was the building?

The rectangular bar is connected to the support bracket with a 10-mm-diameter pin. The bar width is w = 70 mm and the bar thickness is 20 mm. Each side of the bracket has the same dimensions as the bar.

A miniature horse weighs 228 fewer kilograms than a Shetland pony. Use the table to find the weight of a Shetland pony. Miniature horse wights 53kg

In a box of tickets, there are 50 blue tickets and 15 red tickets. after a certain number of red tickets are added to the box, the probability of randomly choosing a red ticket is 2/3. how many red tickets were added to the box?