2.
Determine whether the matrices are inverses.

Yes these are....

Note: all you have to do for these problems is to multiply the two matrices, and see if the answer is 1,0

                                       0,1

you can multiply them by hand or use an online tool...

see the image supplied... it is a free site, and even shows the steps

Step-by-step explanation:

-51  0.5-0.5

-71  3.5-2.5

10    

01    

part 1 answer = 8

part 2 answer = 72

step-by-step explanation:

part 1 explanation = add all of the numbers, then divide by how many numbers you have. so, 200/25 = 8.

part 2 explanation = not gonna lie, this is hard to explain, so just google how to do it.

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation