Q: What is the GCF of 40x AND 18?

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To find the Greatest Common Factor (GCF) of 18 and 126, we will determine their prime factorizations first: **Prime factorization of 18**: ( 18 = 2 \times 3^2 ) *Prime factorization of 126*: ( 126 = 2 \times 3^2 \times 7 ) Now, to find the GCF, we take the lowest power of all prime factors common to both numbers: Common prime factors: ( 2 ) and ( 3 ). Lowest powers: ( 2 ) appears in both factorizations. ( 3^2 ) appears in both factorizations. Therefore, the GCF is: [ \text{GCF}(18, 126) = 2 \times 3^2 = 2 \times 9 = 18 ] So, the GCF of 18 and 126 is ( \boxed{18} ).

The GCF is 18.

The GCF is 18.