Checked baggage at an airport has a mean weight of 40 pounds per bag with standard deviation of 12 pounds. Carry-on bags weigh and average of 8 pounds with a standard deviation of 5 pounds.
Let D represent the difference in weight between a checked bag and a carry-on bag.
What is the standard deviation of D?
7 pounds
13 pounds
ООООО
17 pounds
11 pounds
32 pounds

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step-by-step explanation:

answer: i'm not going to give you the answer, but some hints to work it out.

step-by-step explanation: so, if there is a straight line that means that the line angle is 180°. so we subtract the 2 angle measures provided, (15 and 38) from 180. so the answer is 180 - (38 + 15). (you have to solve the equation)

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3