You score 84 on the first test, 95 on the second test, and 87 on the third test. a. What do you need to score on the fourth test so that your mean score
is 90?

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

Can someone me out here number 4 plz

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.