Andrew is trying to create a number puzzle for his younger sister to solve. he challenges his sister to find the mustery number. when 4 is subtracted from half a number the result is 5. the equation to represent the mystery number is 1/2m -4 =. andrews sister tries to guess the mustery number. her first gues is 30. is she correct? why or why not? what is the correct answer?

What is the value of r of the geometric series?

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

Need now 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.