Given system of the linear equations: 2x1 + x2 = 1 x2 - x3 = 2 -2x1 + x2 + x3 = -2 solve system of linear equations to find x, y, z a) find lu factorization of the coefficient matrix a b) let y = ux. solve the lower triangular system ly = b c) solve the ux = y

look a the sides they are perpendicular

$20.01

step-by-step explanation:

the sale price is (1.00 - 0.77)($87), or 0.23($87), or $20.01.

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: