Using a Laplace expansion along the first column, we have

The determinant of a 2x2 matrix is trivial,

So we have

Do a proportion. so basically do 4 over 8 equals x over 100. then do 4 times 100 divided by 8 and that will give you ur answer. hope that helped!
Answer:
36 and 49
Step-by-step explanation:
6x6 and 7x7
Answer:
Albert was born in the year 2000!
Step-by-step explanation:
2006 Kyle is 10
10 - 4 = 6
So, Albert was 6 years old in 2006
6 - 6 = 0
2006 - 6 = 2000
Kyle was born in the year 2000.