Question

Joy is training for a triathlon. She runs a distance of 2x miles, cycles a distance of (x2 + 7) miles, and swims a distance of (x - 2) miles. Which simplified expression is equivalent to the total distance, in miles, Joy covers?

x2 + 3x + 5

x2 + 3x + 9

3x2 + 5

3x2 + 9

Don't know what the equation is supposed to be.

Answer 1

Just add together the three expressions

Answer 2

in the order there in???

Answer 3

(x2 + 7)+(x - 2)

Answer 4

and 2x

Answer 5

Get it?

Answer 6

but where do i put 2x

Answer 7

You can add the individual bits together like numbers.

So you have an x worth of swimming and 2x of running -> 3x

Do you see?

Answer 8

im not very good at math so no i dont get it

Answer 9

OK, lets pretend that x is an apple so now

x (one apple) and 2x (two apples) gives 3 apples (3x)

Apart from that, you have a +7 of cycling and a -2 of swimming so 7-2 is 5

Answer 10

So at the end, after you added everything up you have

x^2 and 3x and 5 (the first of your choices)

Answer 11

oooooooohhhhhh!!!!! wow that wasnt that hard to do i guess i just had to think harder thank you very much you were a big help!!!!

Answer 12

u r welcome