Ms williams asked her class if they perfer doing homework before school or after-school. i the ratio of students who perfer doing homework before school to students who perfer doing home work afterschool is 7: 15 what does the ratio 7/22 represent explain..

the answer is 31.27mph

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