Find: F(2) if F(x)=2x + 1

Which of the following expressions is equal to 2x^2+8

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?