Brice needs 2 feet of ribbon to tie a bow around a birthday present. he has has 3 feet of ribbon. is that enough?

The difference of 2 numbers is 21 and the quotient of the equation is 4 then what are the two numbers?

Let f(x) = x+3 and g(x) = 1/x the graph of (fog)(x) is shown below what is the range of (fog)(x)?

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.