(Will give medal!!!) Which shows solutions to x + 2y = 8 if x and y must be whole numbers.

A.
{(8, 0), (6, 1), (4, 2)}

B.
{(2, 4), (1, 6), (0, 8)}

C.
{(0, 8), (1, 7), (2, 4)}

D.
{(0, 8), (1, 5), (2, 4)}

Question

(Will give medal!!!) Which shows solutions to x + 2y = 8 if x and y must be whole numbers.

A.
{(8, 0), (6, 1), (4, 2)}
 
 B.
{(2, 4), (1, 6), (0, 8)}
 
 C.
{(0, 8), (1, 7), (2, 4)}
 
 D.
{(0, 8), (1, 5), (2, 4)}

cwrw238 · Answer

just plug in the values into the equation and see if they fit
just in case you don't know the first number in the parentheses is x-value and  the second is y-value

anonymous · Answer

None of them fit though??? I don't get it.

cwrw238 · Answer

look at A
 x = 8 and y = 0
8 + 2(0) = 8
8 = 8

that fits 

now try the other 2 sets

cwrw238 · Answer

they are (6,1) and (4,2)

anonymous · Answer

So you just ignore the 0 that's there? Wouldn't 8 + 2(0) = 0?

cwrw238 · Answer

no:   8 + nothing = 8

cwrw238 · Answer

the 8 doesn't disappear..

anonymous · Answer

Wow I feel like an idiot now. I completely forgot order of operations. Sorry about that.

cwrw238 · Answer

ah i see  yea  order of operations is important 

have you heard of PEDMAS?

anonymous · Answer

Yes. I'm usually very good with remembering it, but I have my moments obviously.

cwrw238 · Answer

yep  we all do..

cwrw238 · Answer

- though not everybody admits it

anonymous · Answer

Yep. Well thanks for your help, here's your medal as promised :)

cwrw238 · Answer

yw