Which ratios form a proportion with 9/15?

a.)6/10
b.)16/21
c.)36/50
d.)45/70

At his new job, jeremiah can choose an hourly rate of $9 plus a $50 weekly bonus for opening the store, or an hourly rate of $10 per hour with no opening bonus. the equations model his salary options. y = 9x + 50 y = 10x

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.