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Mathematics 16 Online
MsBrains (ms-brains):

Can someone please help me figure this out? I will medal!

MsBrains (ms-brains):

MsBrains (ms-brains):

I tried using desmos and punching in A. x ≤ - 2;y ≤ - x - 3 B. x < - 2;y ≤ - x - 2 C. x < - 2;y ≤ -x +2 D. x < -3;y < - x -2 But it won't for some reason..

MsBrains (ms-brains):

@jim_thompson5910 Do you mind helping me with 2 more problems?

jimthompson5910 (jim_thompson5910):

what is desmos showing?

MsBrains (ms-brains):

"Sorry I don't understand this"

jimthompson5910 (jim_thompson5910):

are you able to graph x ≤ - 2 using desmos?

MsBrains (ms-brains):

Yes

jimthompson5910 (jim_thompson5910):

what do you notice about the boundary line?

jimthompson5910 (jim_thompson5910):

is it solid? or dashed?

MsBrains (ms-brains):

Solid

jimthompson5910 (jim_thompson5910):

compare it with the drawing given to you. Is that vertical line solid? or dashed?

MsBrains (ms-brains):

Oh! I see where you're going with this. Okay give me a sec to try out the others. A is not the choice because the first line needs to be solid.

jimthompson5910 (jim_thompson5910):

correct. A is not the answer because x <= -2 makes a solid vertical line but the given drawing has a dashed vertical line

MsBrains (ms-brains):

The correct answer is C. It is the only one with a dotted first, and solid second line

jimthompson5910 (jim_thompson5910):

are you sure? look at the second inequality of choice C (look carefully at the right hand side)

MsBrains (ms-brains):

This what I get when I put C in

MsBrains (ms-brains):

It looks correct

jimthompson5910 (jim_thompson5910):

but the diagonal line is too high up

jimthompson5910 (jim_thompson5910):

compare the y intercepts of the two diagonal lines

MsBrains (ms-brains):

Okay, so A and C are out of it. That leaves two choices of B and D. gimme sec to look at them

MsBrains (ms-brains):

It's B. The correct one

jimthompson5910 (jim_thompson5910):

yep, it's B

MsBrains (ms-brains):

Awesome! I'm going do the other one myself ^-^ Thanks again!

jimthompson5910 (jim_thompson5910):

no problem

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