A swing forward 50 degree and back 95 degree. How many degree forward must the swing go to return in starting position

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2

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.

Write the equations in logarithmic form 10^3=1,000