What is the answer to this. x= -6x = 54

Find the area of a parallelogram with base 15 yards and height 21 2/3

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52