HELP PLS :D Please simplify the following expressions fully. Show your steps.

1.) 5(2x - 1) - 6x + 8

2.) 12x - 2(3x+2)

3.) 10 - 3(2x + 5)

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

The sum of two numbers is 12 and their difference is 18 what are the two numbers

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