Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.

2x+y + 4z = 16
5x - 2y + 2z = -1
X + 2y - 32 = -9

A. (-1, 2, 22)
b. (-10, 22, 42)
c. (-1, 2, 4)
d (-10, 2, 22)

Find the area of the triangle formed by the origin and the points of intersection of parabolas y=−3x^2+20 and y=x^2−16.

Tobias gold sells computers at the office center he's guaranteed a minimum salary of $1,959 per month plus 6.3% commission on total sales how much in total sales is he

Becca wants to mix fruit juice and soda to make a punch. she can buy fruit juice for $3 a gallon and soda for $4 a gallon. if she wants to make 28 gallons of punch at a cost of $3.25 a gallon, how many gallons of fruit juice and how many gallons of soda should she buy?