Find the sum of the arithmetic series.
16+7+(-2)+...+(-65)

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement