I'm looking for a place to find math notes. Any ideas where I can get them? It's for Algebra 1..

Standard deviation of 19,29,21,22,23

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?