Y=-5/2x-5 y=-4/3x-1 y=-x+3 y=-4x-1 2x-y=1 x+2y=-8 8x+3y=-9 4x+5y=-10 x-y=-2 4x-3y=9 y=-1 x+5y=-15 -27-10+2x=0 x+5+y=0 3x+20=-4y -15-x=-5y -1=-2x+y -x-1=y 0=5y-x -30+10y=-2x

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %

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