Which word describes the relationship of the points (3, 1) and (3, 6)?

a. collinear
b. parallel
c. perpendicular
d. coincident

Simply 8x squared + 5(7x squared- x) - 2x =

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.