Solve the system using row reduction on a calculator: 7x − 3y + 2z = 19
6x + 5z = 32
5x − 2y + 6z = 32

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

Find the area of a parallelogram with base 15 yards and height 21 2/3

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?