A class is having a contest to see who can guess the number of marbles in a jar. A guess that is 10 or less from the actual number of marbles in the jar wins a school T-shirt. The jar has 486 marbles. Which of these inequalities best represents a guess that wins a school T-shirt?

Question

mathmate · Answer

@ludvic 
Do you have any suggested answer?

anonymous · Answer

@mathmate  
a)$$-10\le x \le10$$
b)$$\x-486|\ge 10$$
c)$$\x-486|\le 10$$
d)$$x-486 \le 10$$

joannablackwelder · Answer

Can you eliminate any answers that just don't make sense?

mathmate · Answer

You can also draw a number line to help you:

|dw:1405641125928:dw|

mathmate · Answer

Which of the answers do you choose and why?