What shape has only 1 pair of parallel line

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab

In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%