Step-by-step explanation:
(2x-y+3)(2x-y-3)=
4x²-2xy-6x-2xy+y²+3y+6x-3y-9=
4x²-4xy+y²-9=
(2x-y)²-9
Answer:
4 7/10
2 3/5 = 2 6/10
2 6/10 - 5/10 = 2 1/10
2 6/10 + 2 1/10 = 4 7/10
0.5
total = 12 marbles
6/12 are red
simplify
1/2 are red
convert
0.5 probibility of picking red.
hope this helps :D
