Answer:
84cm^2
Step-by-step explanation:
The pyramid's SA is the square at the bottom plus the triangles on the side.
The square is 6x6=36.
Per triangle, it's BxH/2. B=6. H=4. Therefore, per triangle has a SA of 12 cm^2.
There are 4 triangles. 48 cm^2 in total for the triangles
36cm^2+48cm^2=84cm^2
D
If the original price is x and you deduct 3, you'l have x - 3.
If you buy 4 of them, you multiply that price by 4, giving you 4(x - 3).
Then, if that value is equal to 27, you get 4(x - 3) = 27
the third one
