5x-3(2x+7)=2x+9 step: 1 5x-6-21=2x+9 step2 -11x -21=2x+9 step 3 -13 x=30 step4 x=-30/13

33 1/243 is  the asnwer

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

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.