Identify the function in which y varies directly with x. a.) y = 4x + 4 b.) y = 4x – 4 c.) y = 4x d.) x = 4y

Someone answer this check out the image!

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.

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! )