population 1 is normally distributed with a mean of 40 and a standard deviation of 4, and population 2 is normally distributed with a mean of 25 and a standard deviation of 7.

It must be A i mean i worked it out for a few so thats what i came up with

Step-by-step explanation:

answer: 2 and 1

step-by-step explanation: got this question

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.