The sum of three numbers is 30. Twice the first number, plus 5 times the second number is 112. Three times the first number minus the second number is 66. Write a system of equations to represent the problem

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

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.

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute