Ruby has $1 worth of nickels and dimes. She has 7 more dimes than nickels. By following the steps below, determine the number of nickels, x, x, and the number of dimes, y, y, that Ruby has.

Pls , the question is in the picture!

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Suppose you are an avid reader and are looking to save money on the cost of books instead of paying about $20 for each book, you decide to look into purchasing a kindle for $120 you can purchase e-books for about $5 each 1. find the slope-intercept equation for the cost of the hard copy of books using x to represent the number of books 2. find the slope-intercept equation for the cost of the kindle with cost of e-books using x to represent the number of books