In a survey of 250 people, 180 like farming , 120 like civil service and every people like at least one occupation. draw a venn daigram and find the number of peole who like farming as well as civil service. Also find how many people like only civil service​

Taking algebra two apex courses and need with these questions

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 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.