Plz help and fast thank u.

X = 12

Step-by-step explanation:

This is quite simple!

Those two angles MUST add up to 180° since it is a straight angle.

Therefore, you can set them equal to 180°

54° + 10x + 6° = 180°

60° + 10x = 180°

-60°             -60°

10x = 120°

10x/10 = 120/10

X = 12

Hope this helps! :)

the domain of a function is the set of input values, x , for which a function is defined. the domain is shown in the left oval in the picture below. the function provides an output value, f(x) , for each member of the domain.