20 points for help -Please help I'm stuck and need to find the ordered pair . I think it's -2,2 but I'm not sure .

What is the simplified form of square root of 400 to the 100th power ?

Write each improper fraction as a mixed number. 9/4. 8/3. 23/6. 11/2. 17/5. 15/8. 33/10. 29/12.

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =