2x – 4y = 14
x = 2y – 2

what is the solution to the system?

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

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

Having a hard time understanding this question (see attachment).