William is three times as old as his daughter, rebecca. rebecca is six years younger than her brother, ben. how old is rebecca if the sum of their three ages is 76 years?
2) janine is six years younger than paul. paul is three times the age of their son brett. brett is five years older than his sister amanda. the sum of all their ages is 125years. how old is each person?

2.83941151 would be the answer you're looking for! : )

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

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14 ft 7 inches

step-by-step explanation:

since each model inch corresponds to 25 real inches, 7 model inches will correspond to

7×25" = 175"

at 12" per foot, that is 14 feet, 7 inches.

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