Consider the lines and angles shown in the diagram Which statement is true if and only if line lis perpendicular to line m?
A
m<1 = m<2
B
m<2 = m<3
С
m<1 = m<4
D
m23 = 180° - m<4

It says factor each expression 49x-28?

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.

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