Acar travels the 120 miles from a to b at 60 miles per hour, and then returns to a on the same road. if the average rate of the round trip is 45 miles per hour, what is the rate, in miles per hour, of the car traveling back from b to a?

65% of students in your school participate in at least one after school activity. if there are 980 students in you school, how many do not participate in an after school activity?

Needmax 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.

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?