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Elenna [48]
3 years ago
7

An elevator starts on the 100th floor of a building. It descends 4 floors every 10 seconds. at what floor will the elevator be 6

0 seconds after it starts?
Mathematics
2 answers:
guapka [62]3 years ago
7 0
It will be on floor 76.
nexus9112 [7]3 years ago
4 0
After 60 sec. at floor 79
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At 2pm on Tuesday the temperature was -12
cestrela7 [59]

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It costs luis 5$ to park his car at a parking meter for 2 hours. What is the price to park for 1 hour? Draw a bar model or write
Aliun [14]

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$2.50

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3 0
3 years ago
PLEASE HELP!!This is joshs solution for the equation x^2-6x-7=0: x^2-6x-7=0
iren [92.7K]

Answer:

  no. see below

Step-by-step explanation:

This much of Josh's working is correct:

  x^2-6x=7

  x^2-6x+9=7+9

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At this point Josh apparently overlooked the fact that he needed to take the square root of both sides of the equation. Had he done that, he would have ...

  x -3 = ±4

  x = 3+4 . . . or . . . 3 -4

  x = 7 or -1

_____

Josh reported values of x that would match ...

  x -3 = ±16

He <em>violated the equal sign</em> by taking the square root on the left, and multiplying by ±1 on the right. Doing different operations on the two sides of the equation will mean the value of x is changed to something other than what you're looking for.

4 0
2 years ago
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