The addition rule for probability P(A or B)=P(A)+P(B)-P(A and B) is used for: 1) finding the probability that A and B both happen
2)finding the probability that A doesn't happen, but B does happen.
3)finding the probability that A or B or both happen.
4)finding the probability that A happens, then B happens.​

i am unable to solve this problem

step-by-step explanation:

17.08

correct me if i am wrong.

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

i suppose it should be (y=2x-5)

step-by-step explanation: