Three sheafs of good crop, two sheafs of mediocre crop, and one sheaf of bad crop sold for 39 dou. Two sheafs of good, three of mediocre, and one of bad sold for 34 dou. One sheaf of good, two of mediocre, and three of bad sold for 26 dou. What is the price for a sheaf of good crop, mediocre crop, and bad crop

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

answer: c. is your answer

step-by-step explanation: get me a black leather coat

see below

step-by-step explanation:

x+2> 6

subtract 2 from each side

x+2-2 > 6-2

x > 4

there is an open circle at 4 since is it is greater than and the line goes to the right