Can i get some help plz its hared

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Combine like terms to make a simpler expression 3z+z

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]