Find the x-intercept(s) and the y-intercept of the function.

a. the x-intercepts are x=
b. there are no x-intercepts

a. the y-intercept is y=
b. there is no y-intercept

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?

A50% increase followed by 33 1/2% decrease

How do i simply this radical expression?