During the first semester Carlos' grade average was 80. He set a goal to raise his average to 84 for the second semester.
By what percent must Carlos raise his grade average?

15 points ! ~ see if you know the answer to both you!

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?