Which equation represents a proportional relationship that has a constant of proportionality equal to 4/5?
a) y=x+4/5
b) y=4/5x
c)xy=4/5
d)x+y=4/5

What are the soultion(s) to the quadratic equation 40- x^2=0

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Arestaurant chef made 1 1/2 jars of pasta sauce. each serving of pasta requires 1/2 of a jar of sauce. how many servings of pasta will the chef be able to prepare using the sauce?