Which graph represents the solution of the system StartLayout Enlarged left-brace 1st row x squared + y squared = 4 2nd row x minus y = 1 EndLayout?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

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.