Bob is thinking of a number. He adds 15 to his number and finds the result is four times his number. Suppose x is Bob's number. Which equation is always true?
Asha receives $10 000. Asha keeps half his money and gives the rest to Bertha.
Bertha keeps half her money and give the rest to Calvin.
Calvin keeps half his money and gives the rest to Dane.
Dane keeps half his money and gives the rest to Evanna.
Which expression shows the dollar amount of money that Evanna receives from Dane?