Answer:
7-12 is 5
Step-by-step explanation:
First you want to turn this into addition and make 12 it's inverse 7+(-12) now with 7+(-12) it is basically 12-7. 12-7=5 so your answer is 5
Answer:
Mean = 21.3
Standard Deviation = 2.48
Step-by-step explanation:
We are given the following in the question:
p = 71% = 0.71
Sample size, n = 30
We have to find the mean and the standard deviation of those that wear glasses.

Thus, the mean of those who wear glasses is 21.3

Thus, the standard deviation of those who wear glasses is 2.48
Answer: 1
Step-by-step explanation:
Answer:
100
Step-by-step explanation:
We want to find a number of the form x y z
We want to of the digits to be the same and for it to be as small as possible
For the number to be small, we want x to be 1
1 y z
We can either have y or z be 1 or y =z
If y=z=0 that is smaller than y or z =1
100