Can anyone help? 1. A normal distribution of scores has a standard deviation of 10. Find the z-scores corresponding to each of the following values: a) A score that is 20 points above the mean. z=2. b) A score that is 10 points below the mean z= -1. c) A score that is 15 points above the mean z= 1.5 d) A score that is 30 points below the mean z= -3.

i got 10.28 but that rounds up to 10.3

answer: do we write it

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

answer: what is the question you're trying to ask?

step-by-step explanation: