Question

Algebra help?

Hannah bought x boxes of cereal boxes and y cartons of milk. The number of milk cartons she bought was 2 more than twice the number of cereal boxes she bought. The total number of cereal boxes and milk cartons she bought was 5. Which graph best shows the number of cereal boxes and milk cartons Hannah bought?

Answer 1

@Opcode

Answer 2

its 1, 4

Answer 3

It says
x boxes of cereal boxes and y cartons of milk.
total number of cereal boxes and milk cartons she bought was 5.

that means x+y= 5

if you change that into slope intercept form you et
y = -x + 5

Answer 4

Ok, I see it, Slope-Intercept form, correct?

Answer 5

I would look for graph with the line
y = -x + 5

(it goes through the point (0,5)
and slants down and to the right, one down, one over.

Answer 6

Why do you think it's 1,4 (answer A.) JM98SMITH?

Answer 7

Ok, I graphed it on my GeoGebra thing, and I got that line, now what else do I do?

Answer 8

If there is only 1 graph with that line, that is the answer.

if more than once choice has that line, you have to plot the second line.

Answer 9

Wait, now I'm confused. So, the answer is A or...

Answer 10

@phi what's the answer then?

Answer 11

JM98SMITH why is it A?

Answer 12

You said
***
Ok, I graphed it on my GeoGebra thing, and I got that line, now what else do I do?
***
can you post what it looks like ?

Answer 13

sure

Answer 14

@phi that's what I got

Answer 15

Do any of your choices A - D have a line like that ?

Answer 16

i attached a file w/ the answers. This doesn't match up to any of them.

Answer 17

here's the file w/ the answers:

Answer 18

You only plotted one of the two lines. But the correct answer choice has to at least have the line you plotted (along with a second line)

Answer 19

You could also plot the second line:

The number of milk cartons she bought was 2 more than twice the number of cereal boxes she bought

which translates to
y = 2+ 2x

Answer 20

Oh wait, yeah! It half matches A. like JM98SMITH told me

Answer 21

The answer is A. So, what I needed to do for this problem was get x and y for an equation that equalled 5, and I already had the y = 2x + 2, I wasn't paying attention, thank you so much JM98SMITH and phi!

Answer 22

Yes, that is right. If more than one choice showed the line y= -x+5, you would want to plot the other line to figure out which of the choices showed *both* lines.

Answer 23

Awesome, thank you! <3