Donna guessed there were 400 jellybeans in a jar. There were really 480 jellybeans. What is her prevent of error

Amber had 1/6 of a pie left after the bake sale. rihanna had 3/8 of a pie left. what fraction of a pie did they have altogether?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

Astuntman jumping off a 20-m-high building is modeled by the equation h=20-5t^2, where t is the same in seconds. a high-speed camera is ready to film him between 15m and 10m above the ground. for which interval of time should the camera film him?