You've randomly surveyed some students in your science class to find the number of hours per week they study. what is the mean, based on your sample? a) 4.75 hours b) 5.05 hours c) 5.25 hours d) 5.45 hours student hours katy 5.5 mike 4.25 sam 7.75 holly 3.5 jake 6.25

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

Find the magnitude, correct to two decimal places, made by each of the following with positive direction of the x axis a) y= x the answer is 45° but i don’t know how

Two numbers have a sum of -19. one number is x. what expression represents the other number?