Answer:
GCF for -30xy^4, 10x^4, and 90x^2y^3 is 10x.
Explanation:
The greatest common factor (GCF) of two or more numbers is the largest number that is a factor of all of them.
For the question:
Monomials -30xy^4, 10x^4, and 90x^2y^3, we get the following:



The prime factors that are common to all of the monomials are 2, 5, and x, so the GCF is 2 * 5 * x = 10x.
Therefore, the GCF for -30xy^4, 10x^4, and 90x^2y^3 is 10x.