Step-by-step explanation:
Let its complementary angle be x.
So
81+x=90
so, x = 9.
so
complementary angle of 81° is 9°.
Answer:
The answer to your question is below
Step-by-step explanation:
Domain of a function is the complete set of possible values of "x".
In a radical function, domain must be ≥ 0.
Exercise
f(x) = 
Then
x + 4 ≥ 0
x ≥ -4
Domain is x ≥ -4 or [-4 , ∞)
Change the mixed numbers to the impropert fractions:


Let x be Kelly's regular pay
Her pay for the day can be modelled by the equation 8x + 4(x + 10) = 160
Solve for x
8x + 4x + 40 = 160
8x + 4x = 160 - 40
12x = 120
x = 10
Kelly's regular pay per hour is $10
Answer:12
Step-by-step explanation: