can you please check if i am correct?

- anonymous

can you please check if i am correct?

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- anonymous

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- anonymous

@Elsa213

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## More answers

- mathmate

#1, 2 are correct.
#3 hint: -x<4 is the same as x>-4 (i.e. the direction of inequality is reversed when you negate an inequality)
#4 "or" means either one works, so the two part-answers are additive
#5 is correct
#6 work out the two cases
2x+4>14 and
-2x-4>14
then take intersection of the two results, i.e. the part of the result that satisfies both cases.
#7 draw on number line each option and figure out the right answer, which should be equivalent to -40

- anonymous

thanks! @mathmate

- mathmate

you're welcome! :)

- anonymous

@mathmate for 3 it would be D right? and can you help me figure out 7 please?

- anonymous

and let me rephrase that. for 3 it would be A right? @mathmate

- mathmate

#3 3

- anonymous

@mathmate 3

- mathmate

For #3, 3= or <=.

- anonymous

@mathmate thanks

- anonymous

@Michele_Laino

- Michele_Laino

-40 F= -40 C
furthermore:
125 °C= 257 °F
I have used this formula:
\[F = \frac{9}{5}C + 32\]

- anonymous

@Michele_Laino can you help me figure the ones that are not correct out please?

- Michele_Laino

it is simple, you have to compute how many Fahrenheit degrees are these temperatures
-40 C and 125 C

- anonymous

-40 C = -40 F
125 C = 257 F what would i do next ?

- anonymous

@Michele_Laino i know its either A or B now

- Michele_Laino

It is option B)

- anonymous

thankss!! can you help me out with #3?

- Michele_Laino

here we have to solve this inequality:
\[ - 13 > - 5x + 2 > - 28\]

- Michele_Laino

actually, they are two inequalities

- anonymous

what would they be? @Michele_Laino

- Michele_Laino

the first inequality is:
\[ - 13 > - 5x + 2\]
whereas the second one is:
\[ - 5x + 2 > - 28\]
please solve them

- anonymous

first: X>3
second: X<6 correct?
@Michele_Laino

- Michele_Laino

yes! correct!

- anonymous

@Michele_Laino I'm thinking a what do you think?

- anonymous

@Michele_Laino

- anonymous

@mathstudent55

- Michele_Laino

yes! correct!

- anonymous

THANK YOUUU! look. i know I'm really annoying and everything but can you please help me with 4? @Michele_Laino

- Michele_Laino

here, you have to solve these inequalities:
\[\Large \begin{gathered}
4p + 1 > - 7 \hfill \\
6p + 3 < 33 \hfill \\
\end{gathered} \]
what do you get?

- anonymous

P>-2
P<5
@Michele_laino

- Michele_Laino

so, what is the right option?

- anonymous

@Michele_Laino i don't know. the person up there said it wasn't A so i don't know

- Michele_Laino

I think it is A

- anonymous

can you teach me find the 2 inequalities so that i can solve 6 please? @Michele_Laino

- Michele_Laino

the proposed inequlity is equivalent to these two systems of inequalities:
\[\Large \left\{ \begin{gathered}
2x + 4 < 14 \hfill \\
2x + 4 \geqslant 0 \hfill \\
\end{gathered} \right. \cup \left\{ {\begin{array}{*{20}{c}}
{ - 2x - 4 < 14} \\
{2x + 4 < 0}
\end{array}} \right.\]
please solve them

- anonymous

for both them is (-2,5) (-9,2) @Michele_Laino right?

- Michele_Laino

the first inequality gives x>-9
and the second one gives x<-2, so the intersection is:
(-9,-2)

- Michele_Laino

the first solution is correct!

- Michele_Laino

more precisely the first solution, is:
[-2,5)

- anonymous

quick question though. theres a point on a -5 on the number line and you got a -2.... is it supposed to be like that? @Michele_Laino

- Michele_Laino

I don't understand, please specify more

- anonymous

never mind i am seeing double from not sleeping my bad sorry haha @Michele_Laino

- Michele_Laino

ok! :)

- anonymous

@t.ashleyxx

- anonymous

@HelloKitty17

- anonymous

What would seem to be the problem?

- anonymous

let me update this. because i fixed some questions. @t.ashleyxx

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