tom and jerry have to stuff and mail 1000 envelopes for a new marketing campaign. jerry can dothe job alone in 6 hours. if tom helps, they can get the job done in 4 hours. how long would ittake tom to do the job by himself?

The distance d that a car can travel in a certain amount of time t can be found by multiplying the rate of speed r by the travel time. if a car has already travel 4 miles, the formula for the total distance travel is d= rt + 4. which of the following gives the value of r, in terms of d and t?

A24-n net force acts on a 8-kg rock.what is the acceleration of the rock?

The difference between the observed value and the mean of the set of values is a