Asporting goods store is having a 15% off sale on all items. which functions can be used to find the sale price of an item that has an original price of x? you may choose more than one correct answer.
ƒ(x) = x - .15x
sale = original - 15
ƒ(x) = 1.15x
sale = original - .15(original)
y = .85x

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.

10 points? me . its important ‼️‼️

What is the solution to this system of equations? y= 2x - 3.5 x - 2y = -14