Suppose a 3x5 coefficient matrix for a system has three pivot columns. is the system consistent? why or why not?

Precalculus question, image attached.

Will mark the brainliest.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?

Rewrite the expression in z to the n power. the expression i was given is: 1 over z to the negative 1 half power.