14. 128
15.25
16.90
those should be right
Any number multiplied by 1 is the number. Think about it this way. If I have 1 group of 8 apples, how many apples do I have? I have 8 apples :)
Let's use the slope-intercept equation:

------------------------------------
d)
5(2a-6) = 10a-30 you would just multiply 2a and -6 by 5