Answer:
6767676766767676776767677676767676677676767676767
Step-by-step explanation:
76767676767676767676767676767676767676767676767676
So 4 triangular faces of the pyramid will have total area
<span>= 4 ×<span>12 </span>× base × height = 4 × <span>12 </span>× 34 × 58f<span>t2 </span>= 3944f<span>t2</span></span>
So <span>3944f<span>t2</span></span> of marble cover the faces of the pyramid.
The picture is a bit blurry but the perimeter of a shape is the lengths added.
(4a - 2b) + (7a + 3) + (9a - 4) = perimeter, I added the sides together
Combine like terms to get:
4a + 7a + 9a = 20a
-2b is left along becuase there are no other like terms
3 - 4 = -1
The perimeter is 20a - 2b - 1
4(x-3) + 2(x+1)
4x-12+2x+2
6x-10
6(3x-1) - 3(x-5)
18x-6 - 3x+15
15x-21
