Question 571243
let x = amount of 1st alloy , y = amount of 2nd alloy , and z = amount of 3rd alloy


you are given the amounts of the components in the final alloy
___ Al = (50.2%)(1000) = 502 lb
___ Cu = (23.8%)(1000) = 238 lb
___ Cd = (26%)(1000) = 260 lb


.4x + .52y + .61z = 502


.38x + .2y + .12z = 238


.22x + .28y + .27z = 260


solve the system of equations to find the amounts of the three alloys



you might want to think about Cramer's Rule