Does anyone 100% kno this for me

Find the solution(s) to the system of equations. select all that apply y=x^2-1 y=2x-2

Calculate the mean value (expected value) of the following discrete variable x (10 points): x = 0, 1, 2, 3, 4, 5, 6 p(x) = 0.2, 0.2, 0.15, 0.15, 0.15, 0.1, 0.05

Pl approximate the value of 13−−√ to the nearest tenths place. plot the approximation on the number line.