Answer:
36
Step-by-step explanation:
12 x 6 = 72 / 2 = 36 because the area of a triangle is base times height divided by 2
9(a^2+14/3)^2-14/3+49
9(a^2+14/3)^2+7
6k +19
7k-k+19
Combine like terms
7k-k = 6k
The expression becomes 6k +19
Answer: 178.31
Step-by-step explanation: subtract 574.54 by 396.23