For which positive integer n will the equations (1) x1+ x2 + x3 + … + x19 = n, and (2) y1+ y2 + y3 + … + y64= n have the same number of positive integer solutions?

Abouncy ball is dropped such that the height of its first bounce is 5.5 feet and each successive bounce is 64% of the previous bounce's height. what would be the height of the 7th bounce of the ball? round to the nearest tenth (if necessary).

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

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.