Given that y is proportional to x, what linear equation can you write if y is 16 when x is 20?

a. y = 5/4x
b. y = 4/5x
c. y = 0.6x
d. y = 20x

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?

Solve 2^x=32 and rewrite this equation in a logarithmic form

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class