If y = kx, where is k is the constant of proportionality, what is the value of k? A) 1/5

B) 1/3

C) 3

D) 5

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Acar loses a quarter of its value every year. it is originally worth $35,000. to the nearest dollar,how much will the car be worth in 8 years?

Asmall book publisher knows that 26 books weigh 41 lbs. how much do 40 books weigh?