20. Suppose random variable Х is continuous
2x
0<x<1
f(x) = 1
0, otherwise
a. Check f(x) is a pdf? (1 pts)
b. Find p (x >0.5)? (2 pts)
c. Calculate E(x) and Var(x)? (​

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Which graph represents the equation y =4x

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.