Hi my school is asking me to do a summer math packet and i don't understand two of the questions. the questions
combine like terms.
1. 5c - 8c 2. 19+ b + 15 - 3b2 + 10b - 17b2
(the 2s in the second problem are exponents)

What is the equation of a parabola y(x) that has a vertex at point (− 1/3 , 0.3) and passes through point (− 2/15 , − 1/2 ).

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.

Determine if the equation defines y as a function of x: 2xy = 1. yes o no