What is the the area of this triangle expressed as a monomial?

Answer:
B. [tex]27x^2[/tex]
Step-by-step explanation:
The area of a triangle is [tex]A = \frac{1}{2}b*h[/tex]. Here b = 6x and h=9x. Substitute the values in the formula and find the area.
[tex]A = \frac{1}{2}*6x*9x\\A= 3x*9x\\A=27x^2[/tex]