Which statements can be represented by this equation? Check all that apply. 2x-9.2=n+4/5.

2 answers:

7 0

A matches it exactly; check that.

B describes 9.2-2x, nope.

Same for C, nope

D has the subtraction before the multiplication, nope

E matches; it switches the addition addends but that has no consequence.

kari74 [83]3 years ago

4 0

The answers are
A,E,B
hop this helps

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A sample of size 126 will be drawn from a population with mean 26 and standard deviation 3. Use the TI-84 calculator.

GenaCL600 [577]

Answer:

1. The probability that x will be more than 25 is 0.6305.

2. The 55th percentile is 26.38.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean 26 and standard deviation 3.

This means that $\mu = 26, \sigma = 3$