Answer:
30 inches
Explanation:
2 boards that were each 6 inches long
The key word is each because this represents multiplication
2 × 6 = 12
1 board that was 18 inches long
1 × 18 = 18
Now we add the two numbers together to find the total length of boards needed
12 + 18
30
Don't forget to include units in your final answer
30 inches