Solve the system of equations by finding the reduced row-echelon form of the augmented matrix for the system of equations.
x+y-z=-2
2x - y + 3z = 9
x - 4y - 2z = 1

In which form is the following function written? y = - 2(x – 3)(x + 5)

What is the volume of this container?

Paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each? 1. define a variable for the situation. 2. write an inequality that represents her profit. note: revenue is money coming in. cost is money going out. profit is the difference between the revenue and the cost. in other words: revenue - costs profit 3.using words, describe how many windows she must sell to have a profit of at least $48,000.