If someone could help me out here it would be greatly appreciated.

k=45

Step-by-step explanation:

the k on the right can be mirrored from the left side of the triangle, the other side of the triangle says that its 45 degrees so that means the answer is as well, but if you want to make sure that the answer is correct then take the 2k degrees then replace the k with 45 and multiple that which gives you 90. add the other 2 45s together which gives you another 90 and then add the two 90s which gives you 180.

the volume is the product of the area of the base, 3x(3x+4), and the height, 3x-1

step-by-step explanation: