Try it Which system has no solution?
y=-3x + 8
y = 9x + 6.25
y = 3x + 9
y = 4.5x-5
-3x + 2y = 6
6x + 2y = -45
-18x + 2y = 12.5
X + 8y = 12.3

72 cm³

Step-by-step explanation:

Volume of a triangular pyramid = a*(h/3), where a is the area of the base triangle and h is the height from the base to the highest point.

We need to first find a, the area of the bas triangle:

Area of triangle = (1/2)bh, where b is the length of the base and h is the perpendicular height.

a = (1/2)12*4

a = 6*4

a = 24 cm²

Knowing a, we can know find the volume:

Volume = a*(h/3)

= 24*(9/3)

= 24*3

= 72 cm³