Find the cardinality of a given set A if A={1,3,5,h, d}​

Plz which expression is equivalent to the expression below?

Suppose you want just guess at the answers in a 5 question multiple-choice test. each question has 3 responses and only one is correct. what is the probability of getting two questions right just guessing? 20 points 0.3275 0.2753 0.7532 none of the above

The suare root of 9x plus 7 plus the square rot of 2x equall to 7