4n+8=2(n+6)
Now isolate the n on one side of the equation:
4n+8=2n+12(distribution of the 2)
4n=2n+4(combine like terms)
2n=4(combine like variables)
N=2(isolate the n)

The answer is 2
Good luck!

3 0

3 years ago

Find AuB and AnB for the sets A and B. A={3, 4, 5, 6, 7), B = {4, 6, 8, 10)

kvv77 [185]

Answer:

AuB= {3,4,5,6,7,8,10}

AnB= {4,6}

7 0

3 years ago

The distance traveled by a car at a constant rate is proportional to the time spent driving. In the equation d = 45t, d represen

OverLord2011 [107]

The constant of proportionality should be 45 miles per hour, and the car should travel 135 miles in three hours.

8 0

3 years ago

A set of city temperatures in April are normally distributed with a mean of 19.7 degrees Celsius and a standard deviation of 2 d

Sati [7]

Answer:

19.77% of average city temperatures are higher than that of Cairo

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

$\mu = 19.7, \sigma = 2$