Question

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

Answer 1

@noseboy908

Answer 2

ok, first make an equation: I would come up with "x + (3x^2 - 9) + (2x + 9)" can you solve from here?

Answer 3

11x?

Answer 4

umm, no, add like terms up. for instance,start with adding (-9) to 9.

Answer 5

o

Answer 6

or, as you could also say, they cancel eachother out. now, do you have any more like terms that you could put together?

Answer 7

3x and 2x

Answer 8

they are close, but because 3x is not just 3x, and is actually 3x^2, they are not like terms.

Answer 9

because the 2x isn't squared it's different

Answer 10

o ok

Answer 11

there is one more like term you can add to "2x", though

Answer 12

2 and 2x

Answer 13

is the answer C.

Answer 14

close, but no cigar.

Answer 15

ok

Answer 16

2x+x equals what?

Answer 17

3x

Answer 18

so the answer must be...

Answer 19

D.

Answer 20

:D Correct!