Anybody know this answer?

What is the perimeter of a rectangle if the length is 5 and the width is x?

Two lines intersect and two of the vertical angles measure 115°. what is the measure of the other two vertical angles? 65° 85° 90° 245°

The continuous random variable x is uniformly distributed over the interval [–1,3]. find -e(x) -var(x) -e(x²) -p(x < 1.4) a total of 40 observations of x are made.