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Mathematics 10 Online
cookiemonster:

Which of the following is an equivalent form of the compound inequality −44 > −2x − 8 ≥ −8? −2x − 8 > −44 and −2x − 8 ≥ −8 −2x > −44 and −8 ≥ −8 −2x − 8 < −44 and −2x − 8 ≤ −8 −2x − 8 < −44 and −2x − 8 ≥ −8

cookiemonster:

@Vocaloid

Angle:

ok, so the idea of this is that you want to separate the line of inequalities in a way so you get only one inequality per equation

Angle:

-44 > -2x - 8 ≥ −8? ^^^^^^^^^^^^ you take these so -44 > -2x - 8 do you see how I got that piece?

cookiemonster:

yes i have another question Which of the following is not a way to represent the solution of the inequality 3(2x − 1) greater than or equal to 4(2x − 3) − 3? x less than or equal to 6 6 greater than or equal to x A number line with a closed circle on 6 and shading to the left A number line with a closed circle on 6 and shading to the right

Angle:

This one you would have to solve completely try solving it like you would a normal "equals" equation

cookiemonster:

c?

Angle:

hmm I think there are two answers to this question?

cookiemonster:

there cant b .. only 1

Angle:

ohhh I was thinking about the answer, but the question was asking for which is "NOT" a way to express the thing

cookiemonster:

YES... hehe

Angle:

This is c |dw:1507857529427:dw|

Angle:

take a look at the other answers and compare them to that picture?

cookiemonster:

ok so c is not right?

Angle:

no, I don't think C is right try seeing what the other options look like

cookiemonster:

ok A?

Angle:

A: x is less than or equal to 6 what would this look like would it be shaded to the Left or Right of 6?

cookiemonster:

umm left i think

Angle:

so that would look the same as C right?

cookiemonster:

right omg b! i think

Angle:

B: 6 is greater than or equal to x that would be something like 6 > x x < 6 which side of 6 would this be shaded on? Left or Right?

cookiemonster:

i beleive ohhh right!

Angle:

??? how would you graph x < 6 ? "6 is greater than x" is the same as "x is less than 6"

cookiemonster:

oh sorry i meant left

cookiemonster:

so that leaves us with d? :)

Angle:

yup

cookiemonster:

Which of the following is not a way to represent the solution of the inequality 3(2x − 1) greater than or equal to 4(2x − 3) − 3? x less than or equal to 6 6 greater than or equal to x A number line with a closed circle on 6 and shading to the left A number line with a closed circle on 6 and shading to the right

Angle:

that was the problem we were just on?

cookiemonster:

oh yea sorry

cookiemonster:

The length of a rectangle is 24 units. Can the perimeter x of the rectangle be 60 units when its width y is 11 units? No, the rectangle cannot have x = 60 and y = 11 because x = 48 + 2y No, the rectangle cannot have x = 60 and y = 11 because x = 24 + 2y Yes, the rectangle can have x = 60 and y = 11 because x + y is greater than 48 Yes, the rectangle can have x = 60 and y = 11 because x + y is greater than 24

Angle:

so the Perimeter of a rectangle = (Length) + (Length) + (Width) + (Width) if the Length = 24 and the Width = 11 does 60 = 24 + 24 + 11 + 11 ??

cookiemonster:

you want me to solve that?

Angle:

yes what is 24 + 24 + 11 + 11 but do you know where I got the numbers?

cookiemonster:

70

Angle:

do you know where I got the numbers?

cookiemonster:

not really

Angle:

Here's an easier example: can you tell me what the perimeter of this rectangle is? |dw:1507858242632:dw|

cookiemonster:

5

Angle:

Do you know what the word "perimeter" means?

cookiemonster:

no

Angle:

The perimeter is the total length of the outside of a shape If someone had to walk around a building, how far would they have to walk? |dw:1507858599071:dw|

Angle:

In this case, the amount they would have to walk would be 5 + 2 + 5 + 2 does that make sense?

cookiemonster:

yes

Angle:

So if I asked you What is the perimeter of (the picture)? |dw:1507858929303:dw|

Angle:

What would you get?

cookiemonster:

14??

Angle:

Yup! :D

cookiemonster:

AND THEN

cookiemonster:

IS THE ANSWER a?

Angle:

|dw:1507859804523:dw|

cookiemonster:

70

Angle:

The question is then asking if does 60 = 70 ?

cookiemonster:

no

cookiemonster:

The length of a rectangle is 24 units. Can the perimeter x of the rectangle be 60 units when its width y is 11 units? No, the rectangle cannot have x = 60 and y = 11 because x = 48 + 2y No, the rectangle cannot have x = 60 and y = 11 because x = 24 + 2y Yes, the rectangle can have x = 60 and y = 11 because x + y is greater than 48 Yes, the rectangle can have x = 60 and y = 11 because x + y is greater than 24 so is the answer A?

Angle:

yup!

cookiemonster:

OK NEXT! can you answer faster.. i need to finish these questions asap Which of the following is not a way to represent the solution of the inequality 2(x − 1) less than or equal to 10? x less than or equal to 6 6 greater than or equal to x A number line with a closed circle on 6 and shading to the left A number line with a closed circle on 6 and shading to the right

cookiemonster:

and this is a different problem they are similar but the numbers are different

Angle:

I need to go, could you ask it in a different post and get someone else to help?

cookiemonster:

please wait just answer this one you dont have to explain it

Angle:

2(x − 1) less than or equal to 10 2x - 2 less than or equal to 10 2x less than or equal to 12 x less than or equal to 6 which one is NOT equal to that?

cookiemonster:

ummmmm b?

Angle:

think of the > or < as it wants to eat the bigger one so x < 6 is the same as 6 > x

cookiemonster:

so A?

Angle:

A: means x < 6

cookiemonster:

oh right.... and its not b you saidm so c

Angle:

x < 6 is C

cookiemonster:

so d as well?

Angle:

yup .-.

cookiemonster:

hehee

cookiemonster:

Choose the missing step in the given solution to the inequality −x − 10 > 14 + 2x. −x − 10 > 14 + 2x −3x −10 > 14 _______________ x < −8 −3x > 24 −3x < 4 −3x > −4 8 < x

Angle:

please take the time to talk to your teacher about getting extra explanations. I feel like you don't truly understand how to answer these questions

Angle:

I need to go

cookiemonster:

ok i will :)

cookiemonster:

oh ok... :( thanks for helping me

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