ChecK if x=2 is a solution of a) 7x+5=21 b 2*-2=2

Hurry if the population of of an ant hill doubles every 10 days and there are currently 100 ants living in the ant hill what will the ant population be in 20 days

What is the unit rate of, 75% high fiber chimp food to 25% high protein chimp food.

Roy has 4 1/2 pizzas for the soccer team to split after the game. if each member is going to get 1/2 of a pizza, how many players are on the soccer team