10 x 25 = 250, well 20 x 25 is just double that, its 10 doubled x 25 so he probably just added it up. repeated addition really helps with times tables.
The answer would be letter D!
hope this helps!! pls also mark me brainliest if you can :)) i am trying to level up. thank you!!
Answer:
15.
Step-by-step explanation:
The given functions are
We need to find the value of f[g(1)].
Therefore, the value of f[g(1)] is 15.