The equation y=4x+4 estimates the number of U. S. households, in millions, expected to install devices that receive and manage broadband TV and Internet content to the home, where x is the number of years after 2005. For what years will there be at least 40 million homes with these devices? Write your answer as an inequality involving x.

Question

Mathematics

Conrad Barr

30 July, 06:06

The equation y=4x+4 estimates the number of U. S. households, in millions, expected to install devices that receive and manage broadband TV and Internet content to the home, where x is the number of years after 2005. For what years will there be at least 40 million homes with these devices? Write your answer as an inequality involving x.

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Answers (1)

Know the Answer?

Lisa Luna · Answer 1

X ≥9 years after 2009.

Step-by-step explanation:

Y=4x+4

Y-4=4x

X = (Y-4) / 4

Y=number of U. S. households, in millions.

Y≥40

Y-4≥36

(Y-4) / 4≥9

So, X≥9.