Identify the decimal labeled with the letter a on the scale below

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?

You draw a card at random from a deck that contains 33 black cards and 77 red cards.