PLEASE HURRRYYY Simplify
√x2 (2 means squared)

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

For what value of x does 4x = (1/8) x + 5?

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?