Every hour, kit is able to bike the same number of kilometers. if on his 2nd hour of biking he has gone 40 kilometers, and on his 5th hour of biking he has gone 100 kilometwrs, what is the rate at which he bikes?

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

To solve the system of equations below, pedro isolated the variable y in the first equation and then substituted it into the second equation. what was the resulting equation? { 5y=10x {x^2+y^2=36