Let's factor the top and the bottom.
Top factors 4x + 20 = 4(x + 5)
Bottom x^2 + 2x - 15 = (x + 5)(x - 3)
The gcf is the largest value that will go into both the top and the bottom. In our problem the ONLY thing that will go into top and bottom is x + 5 so that is your GCF. (c)
1 1/2 = 3/2. 7 1/2 = 15/2
15/2 divided by 3/2 = 5 batches of cookies
Hello,
This number is already in stranded form.
If you want it in scientific notation its : 5.4003*10^6
Hope this helps a bit.
