If x and y are real numbers [x+y]=[x]+[y] . Is it true or false

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76

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.

Which equation can be solved to find x the measure of jk in the apex