Which sum or difference is modeled by the algebra tiles? OA (x2 - 2x + 3) - (-2 - 4x - 2) - 2x-1
B. (x2 - 2x - 3) + (x2 - 4x + 2) - 2x-1
OC (x2 - 2x - 3) - (x2 + 4x + 2) = 2x-1

Plzzz plzz maths ! quadratic sequences =an^2+bn 1) 1,6,15,28,45 2)5,18,39,68,105 3) 1,8,21,40,65 4) 7,24,51,88,135 5) -1,2,9,20,35

What is sin 7x/4 ? i need on this urgent trig

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