The perimeter of a triangle is 45 centimeters. find the lengths of its sides if the longest side is 7 centimeters longer than the first shortest side and the remaining side is 2 centimeters longer than the shortest side

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.

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path

Select the point that is a solution to the system of inequalities. y< =-x+3 y=x^(2)-3x