Which measure of center (mean or median) is resistant?

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

Plz hurry evaluate the expression a+b where a=8 and b=19

Jude is making cement for a driveway. the instructions show the amount of each ingredient to make 1 batch of cement. complete each statement to adjust the ingredients for each new situation if jude uses these instructions.