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Debora [2.8K]
4 years ago
9

CHECK MY WORK PLEASE (I chose C)

Mathematics
1 answer:
BARSIC [14]4 years ago
5 0
Answer: Choice D) 7x+2; all real numbers

-----------------------------------------------------

Work Shown:

f(x) + g(x) = [ f(x) ] + [ g(x) ]
f(x) + g(x) = [ 4x-5 ] + [ 3x+7 ]
f(x) + g(x) = 4x-5  +  3x+7 
f(x) + g(x) = (4x+3x) + (-5+7)
f(x) + g(x) = 7x+2

The domain of y = 7x+2 is the set of all real numbers. There are no restrictions to worry about such as dividing by zero or taking the square root of a negative number. We can plug in any real number we want for x to get some output for y. This is one of the many properties of linear equations. 

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