Using logarithms property of log(x)+log(y)=log(xy)
so here, you can sum the equation to;

so you can simply say that;

and by multiplying (x+6)*(x-6)

and as you know also that;

is same as

so you can simply state it as;

And you can check your work by substituting with 10 instead of x in the original function.
Hope this helps!
The an answer is 2x
explanation :
12+3x-x-12
= 3x-x
= 2x
Reasonable to estimate that 120/6 = 20 (because 20*6=120)...so you know it's going to be close and therefore "reasonable"
Major arc, if it was semi circle, it would’ve been a half circle.
Minor arc if the circles angle was below a 135 degree angle.
Answer:
30
Step-by-step explanation:
Right angle = 90 degrees
180-90 = 90, hence the right side of the equation.
x+37+x+67 = 90
2x + 104 = 90
2x = -14
x = -7
Plug in x.
-7+37 = 30 (angle a)
Angle a = 30