A distribution of scores is approximately normal with a mean of 78 and a standard deviation of 8.6. Write an equation can be used to find the score x above which 33 percent of the scores fall?

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 78

Standard Deviation, σ = 8.6

We are given that the distribution is a bell shaped distribution that is a normal distribution.

Formula:

We have to find the value of x such that the probability is 0.33

Calculation the value from standard normal z table, we have,  

which is the required equation.

Thus, values greater than equal to 74.22 above which 33% of the score fall.

1.3

step-by-step explanation:

3x2=6   9x+6

bring down the 6 on both sides

6+6=12

12= 9x

divide by 9

12/9 =

1.3 =x

both graphs increase on their domain

neither graph has a y-intercept

step-by-step explanation:

the following points can be visualized easily from the graph