A company distributes its product by train and by truck. The cost of distributing by train can be modeled as −0.07x^2 + 40x − 105, and the cost of distributing by truck can be modeled as −0.03x^2 + 22x − 180, where x is the number of tons of product distributed. Write a polynomial that represents the difference between the cost of distributing by train and the cost of distributing by truck.

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A company distributes its product by train and by truck. The cost of distributing by train can be modeled as −0.07x^2 + 40x − 105, and the cost of distributing by truck can be modeled as −0.03x^2 + 22x − 180, where x is the number of tons of product distributed. Write a polynomial that represents the difference between the cost of distributing by train and the cost of distributing by truck.

Mathematics
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Take your 1st function: −0.07x^2 + 40x − 105 Then subtract the second function: −0.03x^2 + 22x − 180 What do you get?
What I got is not an answer choice.
show me what u got

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I just cleared it out haha I need to have a polynomial as an answer, I got a decimal number?
$$ −0.07x^2 + 40x − 105 - (−0.03x^2 + 22x − 180)\\ =−0.07x^2+0.03x^2+40x-22x-105-180\\ =(.03-.07)x^2+x(40-22)-285 $$ Can you do the rest?
this stuff confuseses me so much haha.. So I take _.(.03-.07_x^2+x(40-22)-285 as subtracting or adding? :S
Do the arithmetic within the parenthesis. Like this... $$ =-0.04x^2+18x-285 $$
−0.04x^2 + 18x − 285 the correct answer?

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