(WILL GIVE BRAINLIEST ANSWER) The universal set U is defined as the set of positive integers less than 10. The subsets A and B are defined as:

A = {integers that are multiples of 3}
B = {integers that are factors of 30}

(a) List the elements of
(i) A:
(ii) B:

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?