Answer:
-422
Step-by-step explanation:
51[-2]³ - 21 + 7
51[-8] - 14
-408 - 14 = -422
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Answer:
36
Step-by-step explanation:
2x3 x 2x3 = 36
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Answer:
84,375 m^2
Step-by-step explanation:
We need to find the surface area of the pyramid. The pyramid can be divided into 4 triangles and one square (the bottom).
Area of a triangle is 1/2*b*h where b is the base of the triangle and h is the height.
Area of a square is length times width.
Total area = 
Answer:
The first one and the second one.
Step-by-step explanation: