What is the value of x in the triangle below?

Julia chooses a card at random from her set of cards. what is the probability that the card is labeled cat or hamster?

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Amountain climber starts a climb at an elevation of 453 feet above sea level at his first rest stop he has climbed 162 feet and by his second rest stop he has climbed another 207 feet its getting late in the day so the climber starts his way down if the climber desends 285 feet how much does he need to ascend or descend to return to the original starting point