Write a direct variation equation that goes through (2,4) enter your answer in the form y+kx

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items

How much orange juice do you need to make 2 servings of lemony orange slush?

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong