(7-3t) -5(-1.6t +5) Find the difference! Pls I need this before an hour!!!
2 answers:
Answer:
5t - 18
Step-by-step explanation:
(7 - 3t) - 5(-1.6t + 5)
First, we need to distribute the right side to get rid of the parentheses.
-5 * -1.6t = 8t
-5 * 5 = -25
8t - 25
Now, we have
(7 - 3t) + 8t - 25
We no longer need the parentheses on the left side.
7 - 3t + 8t - 25
Combine like terms.
-3t and 8t are like terms.
-3t + 8t = 8t - 3t
8t - 3t = 5t
7 and -25 are like terms.
7 - 25 = -18
5t - 18
Because 5t and -18 are NOT like terms, this is as far as we can simplify. So, we have our answer.
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Answer:
μ= 65 inches; σ= 0.625 inch
Step-by-step explanation:
The Central Limit Theorem estabilishes that, for a normally distributed(bell-shaped) random variable X, with mean and standard deviation
, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean
and standard deviation
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For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
In this problem, we have that:
By the central limit theorem, the sample of 16 will have:
So the correct answer is:
μ= 65 inches; σ= 0.625 inch