River C is 500 miles longer than River D. If the sum of their lengths is 5,560 miles, what is the length of each river?

River D: 2780 River C: 2280

Step-by-step explanation:

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answer: the common difference is -0.10

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