What should be done to both sides of the equation in order to solve 1/3 x = 4? multiply by 4. divide by 4. multiply by1/3 . divide by 1/3.

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

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?