Suppose a company needs temporary passwords for trial of a new management software. each password will have two letters followed by two digits. the digits 7,8,and 9 will not used. so, there are 26 letters and 7 digits that will be used. assume that the letters and digits can repeated. how many passwords can be created using this format

2 x t divided by n

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

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step-by-step explanation: