What is the value of x?

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x =

Triangle angles add to 180 degrees.

x = 180 - 70 - 30 = 80

80 degrees

x is 90°

Step-by-step explanation:

in a triangle, all angles together have to be 180°

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step-by-step explanation:

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