Somebody with my algebra assignment! simplify: (4x⁵y³)³

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

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. how many hours after the truck's departure will the two meet?

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585