Which is the best step to do next to solve the equation by completing the square?

9(x2 + 6x + 3) = 25
9(x2 + 6x + 3) = 49
9(x2 + 6x + 9) = 31
9(x2 + 6x + 9) = 103

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

Which measure is equivalent to 110 ml? 0.0110 l 0.110 l 1.10 l 11,000 l