Anumber is decreased by seven. then, the new number is multiplied by 3 to get an answer of -9. what is the original number?
a) -30
b) 30
c) 4
d) -4

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}

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

it would take 5 hours i think idk i'm not that good at math.can you me with my questions i need asap.

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step-by-step explanation: