Pls help this homework is due tomorrow and I’m so confused thank you for taking your Time x

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

For the chance to be team captain, the numbers 1-30 are put in a hat and you get two chances to pick a number, without replacement. which formula correctly shows how to find the probability that you choose the number 1 and then 2?

Find the rate of change for the situation. you run 7 miles in one hour and 21 miles in three hours.