Is a trapezoid a shape with no right angles or a shape with two parallel sides or two pairs of parallels and no right angles?

Given the following sampling distribution of one mean with a sample size 49, from a normally distributed population, find the population standard deviation, o.79828588912497

If f(x) =3x-2 and g(x) =2x+1 fins (f+ g) (x)

An alternative to car buying is to make monthly payments for a period of time, and then return the vehicle to the dealer, or purchase it. this is called