How would you determine whether a system of equations was consistent or inconsistent?

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

33% of college students say they use credit cards because of the rewards program. you randomly select 10 college students and ask each to name the reason he or she uses credit cards. find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. if convenient, use technology to find the probabilities.

What is the absolute value of the complex number -4-sqrt2i