What is the decimal form of 8 and 39/40

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

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.]