What is the positive root of the equation x^2 -2x=120?

x=12

Step-by-step explanation:

hello :

x² -2x=120  equivalent : x² -2x+1=120+1

(x-1)² = 121   means : (x-1)² = 11²...(*)

if :  x ≥0    (*) equivalent : x-1=11   so : x=12

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

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153