Based on faa estimates the average age of the fleets of the 10 largest u. s. commercial passenger carriers is 13.4 years with a standard deviation of 1.7 years. suppose that 40 airplanes were randomly selected from the fleets of these 10 carriers and were inspected for cracks in these airplanes that are considered too large for flying. what is the probability that the average age of these 40 airplanes is at least 14 years old

answer: for each 3 girls there is 2 boys . 3: 2

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exa:

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3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

8

step-by-step explanation: