josephine is taking a college course, and her professor bases the course grade on the average of 2 tests taken in the semester. she wants to know what she needs to earn on
the last test to maintain her grade. rearrange the following equation for b. where a is the average of 2 test scores, a and b.
a = a + b
b = 2a - a
b = 2a - a
b = 2(0)
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Max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)