C=3x+2y

Find the minimum value

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.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)

Eric drove 275 miles in 5 hours. at the same rate how long would it take him to drive 495 miles?