Can anyone please help me with this?

Question

anonymous · Answer

attachment

anonymous · Answer

which one?

parthkohli · Answer

these*

parthkohli · Answer

The bike has stopped and is waiting for you

anonymous · Answer

Sorry, your right. But These, Please.

parthkohli · Answer

Domain = numbers you can input
Range = the outputs of the domains

anonymous · Answer

I know that, but the way all this stuff is written, is so confusing.

anonymous · Answer

$y=-|x|$ domain is all real numbers because you can take the absolute value of anything
range is $y\leq 0$ because the absolute values is never negative so $-|x|$ is never positive

anonymous · Answer

for $y=-2x+9$ both domain and range are all real numbers because you can plug in any number you like for $x$ and get out anything for $y$ as the graph is a line

anonymous · Answer

Well my answer choices also confuse me. Whats  the E sign? and the R?

anonymous · Answer

$$\mathbb{R}$$ means all real numbers

parthkohli · Answer

$\mathbb{R}$ ---> real numbers

parthkohli · Answer

@satellite73 did you forget \( ??

anonymous · Answer

and $x\in \mathbb{R}$ means $x$ can be any real number 
@ParthKohli no i see the latex fine

parthkohli · Answer

lol covering up huh?

anonymous · Answer

i see what you mean, $\mathbb{R}$ means all real numbers

anonymous · Answer

only hard one is the first one 
$$x^2y^2=25$$

parthkohli · Answer

$\in$ means "belongs to" for trivia

anonymous · Answer

So number 13 is c?

anonymous · Answer

yes!

anonymous · Answer

since if $x=0$ then $x^2y^2=0$ and not 25

anonymous · Answer

and 14 is D

anonymous · Answer

?