A coin is tossed 3 times find the probabbity that it land on head exactly once is?

Idont understand math at all! : o( use this scenario to answer the remaining questions: brenton purchased a new bedroom set for $4,500.00. he lives in arizona and pays a 8.75% sales tax. if he made a 50% down payment and financed the rest, what amount did he finance? what is the total sales tax brenton will pay? enter your answer in currency format, round to the nearest cent. what was brenton's total amount financed? enter your answer in currency format, round to the nearest cent.

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g

Have yall ever just farted and was like, i farted.