10p - 3p-2/4+5 when p = 10

*I'm in 5th grade pls help*

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.

Lisette takes an ela exam and got 16 out of 27 questions correct. what percentage of the questions did lisette get correct?

What is the slope of a line that is perpendicular to the line y = 2x -6 a. -1/2 b. 1/6 c. -2 d. 2