Yes it is 20 ft. 4 3 foot planks is 12ft. and 6 16 in planks are 96 inches, which divided by 12 is 8 (feet) so 12 + 8 is 20
Answer:A= - 1/5
Step-by-step explanation:
Step-by-step explanation:
step 1. The square matrices are C and D.
step 2. If you add up the top rows you get 2, 8, -4 .
step 3. The answer is B.
