Matt wants to call his mother long distance.
the rate is 80¢ for the first three minutes
and 20¢ for each additional minute.
how long can he talk for $3.00?

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Two airplanes start at the same place and travel in opposite directions,one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?