[2 1 | 1 0 ] • x = [5 | 10]
We multiply by the inverse of
[2 1 | 1 0 ]
det( [2 1 | 1 0] ) = -1
=> [2 1 | 1 0 ]^(-1) = (-1)•[0 -1 | -1 2 ] =
= [0 1 | 1 -2]
=> [2 1 | 1 0 ] • x = [5 | 10]
=> x = [2 1 | 1 0 ]^(-1) • [5 | 10]
=> x = [0 1 | 1 -2] • [5 | 10]
=> x = [0+10 | 5-20]
=> x = [10 | -15]
Answer: THE ANSWER IS D 2,407.5
Step-by-step explanation:
1turn = 360 half a turn is 180360+180=540
Answer:
S= 4
add 9 to -5
= 4
s=4
3.14x6.25
19.625