Check my answer? :D
Ricardo and Kim rowed their canoes from their base camp to a fishing camp. They rowed a distance of x miles upstream on one river, (3x2 - 9) miles downstream on another river, and (2x + 9) miles across a calm lake. Which expression is equivalent to the total distance, in miles, Ricardo and Kim rowed their canoes?

5x2
6x2
3x2 + 2x
3x2 + 3x
I think it's C or D, I'm leaning for C but..? Any thoughts?

Question

Check my answer? :D
Ricardo and Kim rowed their canoes from their base camp to a fishing camp. They rowed a distance of x miles upstream on one river, (3x2 - 9) miles downstream on another river, and (2x + 9) miles across a calm lake. Which expression is equivalent to the total distance, in miles, Ricardo and Kim rowed their canoes?

 5x2
 6x2
 3x2 + 2x
 3x2 + 3x
 I think it's C or D, I'm leaning for C but..? Any thoughts?

anonymous · Answer

how did you get your answer?

anonymous · Answer

okay so your first equation would be (3*2-9)+(2x+9) because it would be the sum of the length of both courses

anonymous · Answer

I put the equations together! :) and yes I agree

anonymous · Answer

so then you would simplify

anonymous · Answer

you add the like terms in each parentheses: 2x+6

bibby · Answer

just an fyi, by  (3x2 - 9) , she meant $ (3x^2 - 9) $

anonymous · Answer

and six is equal to 3*2 so that is your answer

anonymous · Answer

good ur on the right track but how can u simplify 2x+6

anonymous · Answer

ooh

bibby · Answer

and so we have $x+(3x^2 - 9)+ (2x + 9)$

anonymous · Answer

Yeah thanks @bibby  didn't notice that!

anonymous · Answer

okay sorry

anonymous · Answer

so you coldnt combine 3x2 and 2x

anonymous · Answer

ok well Result: is 3x2+2x right?

bibby · Answer

there's a missing x

anonymous · Answer

umm... no I think you still have to put x and the constants into the equation

anonymous · Answer

Yeah where the missing x? o-o

anonymous · Answer

oh and never mind about the constants they cancel out

bibby · Answer

that was directed at lando $x+(3x^2 - 9)+ (2x + 9)=x+3x^2 +2x + \cancel{(9-9)}$

anonymous · Answer

okay and good job!

bibby · Answer

thank you!!!!!

anonymous · Answer

Thanks @bibby ! Medal for you :)

anonymous · Answer

and thank you @hiuperson  for helping!

bibby · Answer

you're both too kind
you might make a lady blush

anonymous · Answer

Welcome! :)

anonymous · Answer

Guys,the answer was actually D, but still thank you!! XD

bibby · Answer

that's what I said the answer was...

bibby · Answer

you were meant to simplify the last statement
$x+(3x^2 - 9)+ (2x + 9)\\color{blue}{x}+3x^2 +\color{blue}{2x} + \cancel{(9-9)}$

bibby · Answer

sorry I should have used my words

anonymous · Answer

Hahahahaha oh crap, guess thats my fault I clicked the wrong answer! And no you're perfectly fine! :)

bibby · Answer

lol, let this serve as a lesson. always make sure you can confirm the answer