Question

Find the value of the expressions -2x+xy and (2x-3)/y if x=-2 and y=3. VERIFY YOUR RESULTS USING A GRAPHING UTILITY.

Answer 1

@jim_thompson5910 @mathstudent55 @SolomonZelman

Answer 2

just plug in the given value into your expressions

Answer 3

What about the graphing?

Answer 4

This does not involve any graphing, just plugging in and calculating.
\(\normalsize\color{blue}{ -2x+xy }\) (you know that `x=-2` and `y=3`, so therefore)
\(\normalsize\color{blue}{ -2(-2)+(-2)(3) }\)
I have plugged-2 for x, and 3 for y.

can you finish this one off ?

Answer 5

Yes, -2, and I thought it didn't involve graphing but the problem asks for it. So there's nothing I can do to verify with graphing?

Answer 6

your expressions are not to graph, they are not a line function .. not even an equation-:(
The only thing I can say, is to plug in the given values for x and for y, and calculate the expressions. Can't help more.
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Unless you wrote the question incorrectly.

Answer 7

It was written correctly. Understood. Thanks.

Answer 8

Maybe then you should talk to your teacher about it, because I feel really bad for just leaving you unanswered like this... -:(

Answer 9

It's ok. I tried contacting her and looking for other resources but I couldn't find anything. Thank you for trying.