Determine if f(x) 1
2x3 + 2x2 -
is a polynomial function. If it is, state the
Х
degree and the leading coefficient. If not, state why.

show us the picture

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show the !

87%

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apex answer

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: a) 56% women

b)44% men

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