Abalanced scale has a bag and 5 blocks on the left tray and 18 blocks on the right tray. if you remove 5 blocks from both trays to keep the scale balanced, how many blocks are in the bag?

The answer is 13 blocks.
Because at first the scale is already balanced with a bag and 5 blocks on the left tray and 18 blocks on the right tray. And if you remove 5 block from both tray to keep the scale balance, the remaining blocks on the right tray will be 13 and the remaining blocks on the left will be zero block and a bag.
So if there are 13 blocks inside the bag, the balanced scale will still be balanced.

Answer:

$4034.40

step-by-step explanation:

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40