The mean of a set of 5 numbers is 39 and the median is 40. if the mean of the largest two numbers is 49 , then what is the sum of the smallest two?

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.

Mandy and four of her friends want to see a movie. if m represents the cost for one person to see a movie, which expression represents the cost for mandy and her friends to see a movie?

Atwo-dimensional figure made from two or more geometric figures