Which of the following matrices has an inverse?
(4-21)
12 1]

If you are dealt 4 cards from a shuffled deck of 52? cards, find the probability that all 4 cards are diamondsdiamonds.

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.