I think the first one might be 18 second might be 10
Answer:
12
Step-by-step explanation:
Answer:
8 boards.
Step-by-step explanation:
Since he bought a few of each length. The only combination that works is when he bought 5 of the 4 ft long board so 4×5=20. Than he bought 3 of the 5ft boards 3×5=15. 20+15=35 ft worth of boards.
Check the picture below.
you can pretty much just count the units off the grid.
the perimeter is the length of all sides summed up.