Write a system of equations to describe the situation below, solve using elimination, and fill in the blanks. Sandra is a costume designer for the local children's theater company. Yesterday, she sewed 4 female costumes and 4 male costumes, which used 56 meters of fabric. Today, she sewed 4 female costumes and 3 male costumes, which used a total of 53 meters. How many meters of fabric does each type of costume require? each female costume requires blank meters of fabric {comma} and every meal costume requires blank meters.

Aprisoner is trapped in a cell containing three doors. the first door leads to a tunnel that returns him to his cell after two days of travel. the second leads to a tunnel that returns him to his cell after three days of travel. the third door leads immediately to freedom. (a) assuming that the prisoner will always select doors 1, 2 and 3 with probabili- ties 0.5,0.3,0.2 (respectively), what is the expected number of days until he reaches freedom? (b) assuming that the prisoner is always equally likely to choose among those doors that he has not used, what is the expected number of days until he reaches freedom? (in this version, if the prisoner initially tries door 1, for example, then when he returns to the cell, he will now select only from doors 2 and 3.) (c) for parts (a) and (b), find the variance of the number of days until the prisoner reaches freedom. hint for part (b): define ni to be the number of additional days the prisoner spends after initially choosing door i and returning to his cell.