HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
If x = –4, evaluate –x. A. 8 B. 4 <----- i think its this one C. 0 D. –4
Mathematics
katieb
  • katieb
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HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
@haleyelizabeth2017 @DARTHVADER2900 @LunaTiger @Loser66 Can one of u guys help me ?
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
ok thnx anyway :-)
freckles
  • freckles
yes the opposite of -4 is 4

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HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
ok thanks
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
can u help me with a couple more questions @freckles
freckles
  • freckles
sure
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
Simplify. 6 – [–(–1)] A. –7 B. 7 C. –5 D. 5
freckles
  • freckles
well do you know what -(-1) equals?
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
1 ?
freckles
  • freckles
right so you have 6-[-(-1)] 6-[1] drop [ ] 6-1
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
Simplify. | –3.9| + | 3.9| A. –7.8 B. 0 C. 7.8 D. 8
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
is 0 correct? my calculator says 0
freckles
  • freckles
|-3.9| is the number of units that represents the distance from -3.9 to 0 |3.9| is the number of units that represents the distance from 0 to 3.9 |a| is the number of units that represents the distance from a to 0 or you could say 0 to a it doesn't matter anyways distance is a positive or zero number
freckles
  • freckles
do you know how far -3.9 is from 0?
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
4 ? or 3 ?
freckles
  • freckles
|dw:1443647324087:dw|
freckles
  • freckles
|-3.9| is 3.9 3.9 is how far -3.9 is from 0
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
oh ok
freckles
  • freckles
|dw:1443647410336:dw|
freckles
  • freckles
you have 3.9+3.9
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
oh ok so its 0
freckles
  • freckles
3.9+3.9 isn't 0
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
ok 7.8
freckles
  • freckles
yes 9+9=18 so 3.9+3.9=(1+3+3)+.8=7+.8=7.8
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
Evaluate the expression if d = –3. |d| A. –3 B. 0 C. 1 D. 3 <------ i think its this one ? one more after this
freckles
  • freckles
yes |-3| is the distance from -3 to 0 distance is only positive or 0 so |-3|=3
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
Solve the equation with the replacement set {–59, –9, 9, 59} |34 – x | = 25 A. 9, 59 B. 9, –9 C. 9 D. 59
freckles
  • freckles
have you plugged in the numbers to see which work?
freckles
  • freckles
like which of the following are true: |34-(-59)|=25 |34-(-9)|=25 |34-9|=25 |34-59|=25
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
oh ok nvm i got it. It's 9, right?
freckles
  • freckles
did you check the others like have you found 34-59 and then find the distance that result is from 0?
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
yup. 34 - 59 = -25 34 - -59 = 93 34- -9= 43
freckles
  • freckles
and |-25|=25
freckles
  • freckles
|34-59|=|-25|=25 so |34-59|=25 is a true equation
freckles
  • freckles
which means 59 also works
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
oh okay
freckles
  • freckles
you have two solutions 9 and 59 I hope you see why
HELLOMYNAMEISKAM
  • HELLOMYNAMEISKAM
Oh ok now i do. Thanks for the help.

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