The probability that an event will occur is 1. which of the following best describes the likelihood of the event occurring? likely certain unlikely impossible

Certain.

Why?

If something has a probability of 1, then it is always going to be certain. If something has the probability of .5-.9 then it is likely. .1-.4 is unlikely, and 0 is impossible.

AKA decimals are used to represent likely and unlikely scenarios. 0 is used to represent impossible, and 1 for certain.

true

step-by-step explanation:

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