What is the greatest common factor (gcf) of 24x^4 and 80x^5
a.) 4x^5
b.) 6x^4
c.) 8x^4

The greatest common factor (GCF) of the expressions is a product of the GCF of the numerical coefficients and the variables. The GCF of the 24 and 80 is 8. Additionally, the GCF of x^4 and x^5 if x^4. Thus, the GCF is 8x^4. The answer to this problem is letter C. 

First, 4d-7=25/4
Then,4d=53/4.
Then you cross multiply, to get 16d = 53. Your final answer is 53/16, or 3 5/16.