Highest common factor of 30 and 45

The GCF of 30 and 45 is 3 × 5 = 15.

Step-by-step explanation:

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factors of 30 = 1, 2, 3, 5, 6, 10, 15, 30;

factors of 45 = 1, 3, 5, 9, 15, 45

choose the greatest factor that exactly divides both 30 and 45,

i.e., 15.

final answer is 15

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2