Cho hàm số y = 2x + 1 a)Tính giá trị của hàm số tại x = -1/2
b)Tính giá trị của x biết y = -3

What is 32+4 x (16 x 1/2) -2 show your work}

Evaluate the following expression 1/3^2

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?