BRAINLIST Wei is writing out expressions from verbal descriptions. He writes "multiply two by the difference of n and three" as 2(n - 3). He writes "subtract one from the sum of n and six" as 1 - (n + 6). He writes "add five to the product of four and n" as 5 + 4 × n. Complete the statements.

Wei made a mistake when writing
as an expression.

The correct way he should have written the expression is
.

Determine if the following statement is true or false. the normal curve is symmetric about its​ mean, mu. choose the best answer below. a. the statement is false. the normal curve is not symmetric about its​ mean, because the mean is the balancing point of the graph of the distribution. the median is the point where​ 50% of the area under the distribution is to the left and​ 50% to the right.​ therefore, the normal curve could only be symmetric about its​ median, not about its mean. b. the statement is true. the normal curve is a symmetric distribution with one​ peak, which means the​ mean, median, and mode are all equal.​ therefore, the normal curve is symmetric about the​ mean, mu. c. the statement is false. the mean is the balancing point for the graph of a​ distribution, and​ therefore, it is impossible for any distribution to be symmetric about the mean. d. the statement is true. the mean is the balancing point for the graph of a​ distribution, and​ therefore, all distributions are symmetric about the mean.