Answer:
Step-by-step explanation:
the second one
Answer:
3565
Step-by-step explanation:


<h3>Hope it is helpful...</h3>
You would do 256.5/18 to get the other side which is 14.25, then you add 18 and 14.25 getting 32.25, now multiply that by 2 because there are 2 of each length sides, and you get 64.5 meters as the perimeter
2 * 8 = 16
2 * 7 = 14
3 + 16 - 5 - 14 = 0
The answer would be 0.
-10u^3-16u^2*4u is the answer