55= 16x^2+7x+32

The number of unique monthly Facebook visitors in millions can be approximated by Vx=16x2+7x+32 where x is the number of years after 2008. Estimate the year when Facebook averaged 55 million unique monthly visitors.
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3 Answers

16x^2 +7x +32=55 . . . 16x^2+7x-23=0 . . . quadratik equashun giv x=1 or x=-1.4375 . . . maebee anser=1
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2009
by

V(x)=16x²+7x+32 so if V(x)=55, 16x²+7x+32-55=0, 16x²+7x-23=0=(16x+23)(x-1).

Since x must be a positive number of years, x=1 and the year is 2008+1=2009.

by Top Rated User (1.1m points)

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