At Raging River Sports, polyester-fill sleeping bags sell for $71. Down-fill sleeping bags sell for $145. In one week the store sold 18 sleeping bags for $1,455. Let x represent the number of polyester-fill bags sold and let y represent the number of down-fill bags sold. Complete the system of equations that can be used to find the number of each type sold.

What is 1/2 x (6 x 4)+3 + 2 show your work

Find the multiplicative inverse of 8-12i

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.