What is the tenth term of the sequence: 5, 15, 45, 135, ... ?

In the diagram above, lines M and N are parallel.

All of the following are true EXCEPT:

Sales for a business were $4 million more the second year than the first, and sales for the third year were double sales of year two.
If sales of the third year were $48 million, what were sales in millions of dollars for the first year?

When x = 4 and y = 6, by how much does the value of 3x 2 - 3y exceed the value of 2x 2 - 2y?

In the standard (x, y) coordinate plane, what is the midpoint of the line segment that has endpoints (3, 8) and (1, -4)?