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HELP .   

For each of the given statements:

• Determine the values of x for which each statement is true.

• Show the set of all points corresponding to the values of x on a number line.

 

x=|x|

 

 

 

HELP#2 .   

 

 

Janet can do a job in 3 hours while Garry can do the same job in 2 hours. If Janet works for an hour before Garry began helping her, how long will it take them to do the job?

 Aug 15, 2019
 #1
avatar+6046 
+2

\(x=|x| \Rightarrow x \in [0, \infty)\)

 

\(\text{Janet's rate is $\dfrac{1}{3}~ job/hr$}\\ \text{Garry's is $\dfrac{1}{2}~job/hr$}\\ \text{Janet works an hour and gets $\dfrac 1 3$ of the job done}\\ \text{Garry joins her and they work at the rate of $\dfrac 1 3 + \dfrac 1 2 = \dfrac 5 6~job/hr$ on the remaining $\dfrac 2 3$ of the job}\\ \text{It takes them $\dfrac{\frac 2 3}{\frac 5 6} = \dfrac 4 5~hr$ to complete the job}\)

.
 Aug 15, 2019
 #2
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-3

Both are rong -_-

 Aug 15, 2019
 #3
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-3

Here is the answer to part 1

\(\frac{9}{5}\)

 

here is the expnation by CPhil

 

https://web2.0calc.com/questions/help_77520

Copy and past into search.

 Aug 15, 2019
 #4
avatar+6046 
+2

CPhil included the 1 hr Janet spent working alone.  I did not.

 

The question asks how long it would take "them" to do the job.

 

If you're going to be so critical perhaps investigate a bit further in the future.

Rom  Aug 15, 2019

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