2x+y=40kx+2y=80 A system of equations is shown, where k is a constant. If the lines represented by the equations in the system are graphed in the xy -plane, for what value of k would the lines coincide?

A- -4
B- 1
C- 2
D- 4

this isn't a real question fool!

Step-by-step explanation:

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 %