Which set best represents the positive integers? O A. {1,2,3,4,...)
O B. {0, 1, 2, 3, 4, ...}
O C. ..., -4,-3, -2, -1}
D. {..., -3, -2, -1, 0, 1, 2, 3, ...}-

O A. {1,2,3,4,...)

Step-by-step explanation:

Its not B because it holds 0 which is ±

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 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