H = V/B

The base of the prism is given by the expression 2X^2+8x-9
then c)5x+3
Hi there! The answer is C.
The area of the square in the middle is the following:

Hence, the area of the square is 25 cm^2.
The area of one triangle is the following:

Hence, the total area of the four triangles is 4 × 20 = 80 cm^2.
Therefore, the total area of the pyramid is 80 + 25 = 105 cm^2. The answer is C.
Left over is 456 minus total of A+B+C
456-334=122
C d are equal so 122/2=61
Answer:
5/3
Step-by-step explanation: