Suppose that $250 was invested at the end of sophomore year, and $400 at the end of junior year in addition to the original $300 and $500 invested at the end of freshmen year. Write and expression for the total value after graduation in terms of x.

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?

Hello, i need compare km^2 and km. what's difference in this?

Will mark ! (10 points also! ) if x varies inversely with y and x =6 when equals y= 10, find y when x=8 a. y=4.8 b. y=7.5 c. y=40/3 d. y=4/15