My friend sets out walking at a speed of 3 miles per hour. i set out behind her 5 minutes later at 4 miles per hour. for how many minutes will my friend have been walking when i catch up to her?

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?

Explain why the factor 1.5 is broke. into two numbers in the model.