what is the weight of the fifth computer?

well, you add it up and show me prof because that it is what i am getting.
skeeter got the same amout. 664.4 . look back at his post
 
eddy2017 said:
NO, YOU'RE NOT SEEING WHAT I DID. I JUST BROKE DOWN THE ADDITION IN TWO PARTS.
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Not true. I see very clearly that you wrote 321.2 + 165 = 486.2+178.2. This statement is simply not true. Why not admit it?
 
I just parsed down the addition for me. i shouldn't have posted. that is all.
 
Jomo said:
Not true. I see very clearly that you wrote 321.2 + 165 = 486.2+178.2. This statement is simply not true. Why not admit it?
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i am not saying that. you are understanding it the wrong way. i am explaning to you what i did.
i sum up to figures and kept adding the results. what is bad about that?
 
eddy2017 said:
i am not saying that. you are understanding it the wrong way. i am explaning to you what i did.
i sum up to figures and kept adding the results. what is bad about that?
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I do know what you are doing. The problem is that equal signs MUST be valid. When I grade exams, all I do is check equal signs. Just because I know what you are doing doesn't mean that it is correct. Again equal signs must be valid.

Here are two examples--one is wrong and the other is correct.

1+2+3 + 4 + 5
= 3 +3
= 6+4
= 10+5
=15.
Only the last equal sign is valid. On an exam which I gave you, you'd lose 3 points for those incorrect equal signs.
There is NO LOGICAL flow from the 1st line to the last line. There is simply no reason that it follow that the 1st line = the last line.



1+2+3 + 4 + 5
= 3 +3+ 4 + 5
= 6+4 + 5
= 10+5
=15.
All those equals signs are valid!
 
sometimes it is better to write down the steps.
167.2 = ( 664.4 + x) /5

( 664.4 + x) /5= 167.2 multiplying both sides by 5

664.4 * x = 836

= 171.6
 
Jomo said:
I do know what you are doing. The problem is that equal signs MUST be valid. When I grade exams, all I do is check equal signs. Just because I know what you are doing doesn't mean that it is correct. Again equal signs must be valid.

Here are two examples--one is wrong and the other is correct.

1+2+3 + 4 + 5
= 3 +3
= 6+4
= 10+5
=15.
Only the last equal sign is valid. On an exam which I gave you, you'd lose 3 points for those incorrect equal signs.
There is NO LOGICAL flow from the 1st line to the last line. There is simply no reason that it follow that the 1st line = the last line.



1+2+3 + 4 + 5
= 3 +3+ 4 + 5
= 6+4 + 5
= 10+5
=15.
All those equals signs are valid!
Click to expand...
Now I know what you mean. I was doing it on my paper just to make sure the addition was correct. with pen and paper. not with calculator. thank you for the explanation, yes, i understand now.
 
eddy2017 said:
sometimes it is better to write down the steps.
167.2 = ( 664.4 + x) /5

( 664.4 + x) /5= 167.2 multiplying both sides by 5

664.4 * x = 836 = 171.6
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664.4*x=836??????
Ooops, you are saying that 836=171.6!!
Oh my, you never said what x equals. That is what the problem asked you to find!
 
If 664.4x = 836, then x = 836/664.4

You meant to write 664.4 + x = 836. Then x= 171.6
 
Jomo said:
664.4*x=836??????
Ooops, you are saying that 836=171.6!!
Oh my, you never said what x equals. That is what the problem asked you to find!
Click to expand...
i did not finish the operation because I thought it was clear what came next. Isolating the x.
 
You wrote 664.4x, which means 664.4 TIMES x = 836
You undo multiplication by division, NOT subtraction.

Again, you meant 664.4 plus x = 836
 
eddy2017 said:
i did not finish the operation because I thought it was clear what came next. Isolating the x.
Click to expand...
I see here. I typed * in instead of + .
I definitely have to pay closer attention when I perform calculations
 
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