The answer is 343 if you add all together:)))
9 x 400 + 9 x 70 + 9 x 5. (9 x 470) + (9 x 5).
Surface area of a rectangular pyramid = A + 1/2 p s
Where:
A = area of the base
p = perimeter of the base
s= salnt height = 5 in
A = Area of a rectangle = length x width = 8 x 4 = 32 in2
Perimeter of the base = 2 lenght + 2 width = 2(8)+2(4) = 24 in2
SA = 32 + 1/2 * 24 * 5 = 92 in2
3(-2) -9
-6-9
-15
-15 Is the value that represents the last expression
i graphed it and they cross at (2,-3)
