Answer:
Your answer is A 7,040 yards.
Step-by-step explanation:
Hope my answer helps you! :D
Answer:
8
Step-by-step explanation:
Perimeter is 284 means the sum of the side measurements is 284.
That is, we have to solve:

Combine like terms:

Simplify:

Subtract 12 on both sides:

Simplify:

Divide both sides by 34:

Simplify:

10. The volume of the triangular prism is
, then
.
11. The volume of the triangular pyramid is
, then
.
12. They have common base (common triangle). y=7.7, r=23.1, then r:y=23.1:7.7=3.
13. See 10 and 11 for notations in symbols.