Answer the question. what is the probability of an event that is certain to occur?

2b = - 10 + b solve for b

Ms. Brown flight left at 9:20 a. m Her plane landed 1 hour ane 23 min later. What time did her plane land?

What is the value of + 2x2, when x = 3? 8 11 14 20

An is a letter or symbol that represents some unknown value

An airline ticket states that the flight takes 2 hours and 25 minutes. The flight time is actually 2 hours and 54 minutes. What is the percent error in the flight time?

Oliver is determining the number of cats in his math class. Oliver is collecting what kind of data?

If Marianne's father calls and says he needs 13 pounds of potting soil how many additional bags should she buy

The sum of the speeds of two trains is 719.9 miles per hour. If the speed of the first train is 8.1 mph faster than that of the second train, find the speeds of each.

If 4 - (2x - 3) = 3, what is the value of x

A box contains ten cards labeled J, k, L, M, N, O, P, Q, R, and S. One add will be randomly chosen. What is the probability of choosing a letter from N and Q? Write your answer as a fraction in simplest form.