okay so I'm not very good in math but my sister need help with her math can anyone help her the problem is below!​

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Which of the following is the explicit rule for a geometric sequence defined a recursive formula of a -5a for which the first term is 23?

Kendra had twice as much money as kareem. kendra later spent $8 and kareem earned $6. by then, the two had the same amount of money. how much money did each have originally?