The school cafeteria offered a choice of pizza or nachos to sixth-grade students. seventy-seven students chose pizza. this represented 35% of the sixth-grade class. how many students are in the sixth grade?

What is the y intercept of f(x)=(1/2)^x?

Jenisey has $24 to spend on seven pencils. after buying them she had $10. how much did each pencil cost.?

Abag contains 3 red marbles, 2 blue marbles, and 2 green marbles. one marble is picked, then another marble. assume that the selections are made with replacement. a) find the probability of picking two red marbles with replacement. b) find the probability of picking a red marble and a blue marble. assume the selections are made without replacement. c) find the probability of picking two red marbles without replacement. d) find the probability of picking a red marble and a blue marble without replacement.