Please help me with these :(( 1. Alan has X chocolate bars and gets 10 more bars. He gives away half of his chocolate and then gets another 10 bars. In terms of X, how many chocolate bars does Alan now have?

2. Stewart’s car can hold a maximum of G gallons in its gas tank, and gas costs C dollars per gallon. If the car currently has 2 gallons of gas in the tank, what is the cost, in dollars, to fill up the rest of the tank?

3. In a series of three numbers, the second number is 3 less than the first, and the third is three times the second. If the first number is X, how much greater than the second number is the third number?

4. Olivia earns a commission of 15 percent of the price of every boat she sells. Which of the following gives the amount of her commission, in dollars, if she sells X boats that each cost Y dollars?