Red and blue
20:1
I’m sorry if I get this wrong
Answer:
we approach the issue by taking note of that a 2 x 2 matrix can either have 1 0r 2 pivot columns. If the matrix has no pivot columns then every entry in the matrix must be zero.
-> if our matrix has two pivot columns then : 
-> if our matrix has one pivot column then we have a choice to make. If the first column is pivot column then: 
->otherwise, if the pivot column is the second column then: 
25,36,49,64,81,100. Hope this helps.
Answer : -9/10
-4/5 times 9/8 = -36/40
Then simplify that you get -9/10
Answer:
9 9/20
Step-by-step explanation:
4 1/5 * 2 1/4
Change the mixed nubers to improper fractions
4 1/5 = (5*4+1)/5 = 21/5
2 1/4 = (4*2+1) /4 = 9/4
21/5 * 9/4 = 189/20
Now we change it back to a mixed number
20 goes into 189 9 times (20*9 = 180 with 9 left over)
9 9/20