3) Determine o valor numérico das seguintes expressões algébricas: a) 2x + 4 y + 12 para x = -8 e y = 3 *

b) m² + 3b -15 para m= 13 e b = 25 *

c) 4 b – 7 b² para b = -2 *

d) 3bx + 2/5 x - 2 para b=6 e x=4

Askate shop rents roller skates as shown on the table below. which graph and function models this situation?

1. why is a frequency distribution useful? it allows researchers to see the "shape" of the data. it tells researchers how often the mean occurs in a set of data. it can visually identify the mean. it ignores outliers. 2. the is defined by its mean and standard deviation alone. normal distribution frequency distribution median distribution marginal distribution 3. approximately % of the data in a given sample falls within three standard deviations of the mean if it is normally distributed. 95 68 34 99 4. a data set is said to be if the mean of the data is greater than the median of the data. normally distributed frequency distributed right-skewed left-skewed

The length of time it takes to find a parking space at 9 a.m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)