Write an equation in point-slope form, y – y1 = m(x – x1), of the line through points (9, –2) and (10, 2). use (9, –2) as the point (x1, y1).

Celeste wants to have her hair cut and permed and also go to lunch. she knows she will need $50. the perm cost twice as much as her haircut and she needs $5 for lunch. how much does the perm cost?

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

On #16 : explain how factoring a trinomial, ax^2+ bx+ c, when a does not equal 1 different from factoring a trinomial when a = 1.