A) Pedro tiene 14 años y su hermana Elisa tiene 3. ¿Cuántos años tienen que pasar para que la edad de Pedro sea el doble de la de su hermana?
La suma de tres números consecutivos es igual a uno más que el doble del mayor. Halla esos tres números.

Asegment in the complex plane has a midpoint at 7 – 2i. if the segment has an endpoint at 11 – 3i, what is the other endpoint?

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

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.