Paul, kevin, justin, and david will share the cost of buying a fishing boat.
•paul will pay 20% of the cost
•kevin will pay 25%
•justin will pay 30%
•david will pay the remainder of the cost
the cost of the boat is $2550. fill in the table to show how much paul, kevin, justin, and david will each pay towards the boat.

Paul = 2550*.2 = 510

Kevin = 2550*.25 = 637.5

Justin = 2550*.3 = 765

David = 2550-510-637.5-765 = 637.5

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

step-by-step explanation: