Does any one can help me with this, please?

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

The plant were you work has a cylindrical oil tank that is 2.5 feet across on the inside and 10 feet high. the depth of the oil in the tank is 2 feet. about how many gallons of oil are in the tank?

Given the equation −4  = 12, solve for x and identify if it is an extraneous solution.