AC is 2x+1
CB is 3x-4
AB= 2x+1+3x-4
13^12 + 11^12 + 8^12 = 384 It will cost 384 dollars for all 12 uniforms
1) first pick red 5/9 blue 4/9
2) second pick when red has been picked red now becomes 4/8, blue stays 4/8
2) Second pick when blue has been picked blue now becomes 3/8, red stays 5/8
Mind you, you only need both different colours so:
first pick red 5/9 x sec pick blue 4/8 = 20/72
and first pick blue 4/9 x sec pick red 5/8 = 20/72
add both up 20/72 + 20/72 = 40/72 = 5/9
<span>(y + 9)(y - 2) = 0 would be the correct answer .</span>
