Answer:
7 units
Step-by-step explanation:

=7
12 divided my four is 3. So three is your answer.
Simple.....
you have

to find what a is....simplify/multiply both sides....

simplifying it too....
18=7a


Thus, your answer, C.
Answer:
One is 3 to 4th power
(3 x 3) x (3 x 3)
Step-by-step explanation:
the other is
3 to 3rd power divided by nine to the fourth power...
(3 x 3) x 3 = 27
(9 x 9 ) x (9 x 9) = 2187
2187 / 27 = 81
Answer:
18
Step-by-step explanation:
f(x)=2x and g(x)=x2+3, find (g ∘ f)(−3)
f(x)= 2(-3)= -6
g(x)= (-3)(2) +3= -6+3= -3
(g ∘ f) = -6 x -3= 18