AC, DF and YZ are straight lines and all angles are in degrees. Y
By first considering the angles
on line ABC, show that AC is
parallel to DF.
x + 25 2x + 50
A
С
B
5x -55

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

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