The answer is 7 14/15. How do I get it? You add 1/3+4/5; which equals 1 2/15. Then you multiply 7, and you get your answer.
Step-by-step explanation:
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Your answer is b because 95% of data is ideally with 2 deviations from the mean and 99.9% of data is within 3 deviations from the mean.
4(x+8)-4=34-2x steps
4x + 32 - 4 = 34 - 2x
4x + 28 = 34 - 2x
4 x + 2 x = 34 - 28
6 x = 6
x = 6/6
x = 1