You go bowling and it costs 20 dollars plus 5 dollars per person (p). Which expression represents the total cost?

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.

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

X+y=-4 x-y=2 use elimination with adding and subtraction