Which of the following is equal to the rational expression when x does not equal -3

If the measure of xyz is 81 what is the measure of yz

Asap the total attendance for all of a baseball league in 2012 was about 7.5×107 fans, while the attendance for the tornadoes in 2012 was about 1.5×106 fans. about how many times more was the attendance for the entire baseball league than the attendance for just the tornadoes? 50 times more 10 times more 2 times more 5 times more

Is the square root of 4 plus the square root of 16 rational?