You earn 1 point for each correct response on a multiple choice test and lose 0.5 point for each incorrect response. each question has 4 answer choices. if a student just guesses, what is the expected value of the guess?

Find the solution of this system of equation -7x+y=-20 9x-3y=36

The multiplicative property of equality states that for real numbers a, b, c, and d, if a = b and c = d, then ac = bd. true false

Select the correct answer from each drop-down menu. james needs to clock a minimum of 9 hours per day at work. the data set records his daily work hours, which vary between 9 hours and 12 hours, for a certain number of days. {9, 9.5, 10, 10.5, 10.5, 11, 11, 11.5, 11.5, 11.5, 12, 12}. the median number of hours james worked is . the skew of the distribution is