spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:21 PM |
got a couple questions
spkoN the god. |
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| 23 Apr 2016 09:21 PM |
ya
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dida324
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| Joined: 17 May 2009 |
| Total Posts: 1645 |
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| 23 Apr 2016 09:22 PM |
algebra is my favourite type of bra
kill me
Better dead, than Red.| what's up guys it's your boy deathkitty |
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spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:22 PM |
$1000 is taken out of a bank vault each day and nothing is added back. Which of the following models this situation?
A. linear function with a negative rate of change
B. linear function with a positive rate of change
C. exponential decay function
D. exponential growth function
spkoN the god. |
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| 23 Apr 2016 09:23 PM |
a
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dida324
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| Joined: 17 May 2009 |
| Total Posts: 1645 |
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| 23 Apr 2016 09:23 PM |
i think it's a
Better dead, than Red.| what's up guys it's your boy deathkitty |
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| 23 Apr 2016 09:23 PM |
and it's A because it decreases at a constant rate by the same amount, so it would be linear.
exponential would be increasingly larger amounts of decay the longer it decays
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spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:24 PM |
NEXT QUESTION
To paint a house, two painters are hired. The first painter can paint the entire house in ten hours. The second painter will need six hours to paint the entire house. If the two painters start painting at 8:00am, at what time will they finish painting the house?
A. 10 AM
B. 11:45 AM
C. 12 PM
D. 2:15 PM
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wishic
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| Joined: 21 Feb 2013 |
| Total Posts: 705 |
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| 23 Apr 2016 09:26 PM |
B, for the second problem
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| 23 Apr 2016 09:28 PM |
Explanation of second problem;
Let's think what will happen at 10: (after two hours) the first painter will have pained two tenths of the house - that is 20%. the second painter will have painted two sixths of the house- that is 33% Together they will have pained 20%+33%, that is 53%. Let's think what will happen at 11: (one hour later) the first painter will have pained one tenth of the house - that is 10%. the second painter will have painted one sixth of the house- that is 16.5% Together they will have pained 10%+16.5%, that is 26.5%. Together with the previous portion we have 53%+26.5%=79.5%
Half an hour later (at 11:30) they will have painted half of 26.5%, that is 13.25, so together it's 92.75%, But at 12 they will have painted 92.75+13.25=106%, which is more than a full house!
So the correct answer is: between 11:30 and 12! (around 11:45 actually) Another solution: (the first painter paints 1/10 in an hour and the second 1/6 in a hour, so together they paint 1/10+1/6 every hour, which is 3/30+5/30=8/30=4/15th of the house. there are 4 quarters every hour, so they paint 1/15 every quarter)
after 3 hours they will have painted 3*4/15=12/15 of the house and they still have 3/15 - they need 45 mins to do this!)
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spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:28 PM |
The value in dollars, v(x), of a certain truck after x years is represented by the equation v(x)= 32,500(0.92)^x. To the nearest dollar, how much more is the truck after 2 years than after 3 years?
A. 25,307
B. 27,508
C. 7,193
D. 2,201
spkoN the god. |
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wishic
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| Joined: 21 Feb 2013 |
| Total Posts: 705 |
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| 23 Apr 2016 09:29 PM |
why would you need 2 painters if 1 of them can finish quicker than the other
-mutes mic- |
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| 23 Apr 2016 09:30 PM |
hey I'm okay at algebra
any more questions |
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spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:30 PM |
ANSWER THE ONE ABOVE WISHICS POST
spkoN the god. |
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| 23 Apr 2016 09:30 PM |
ok seriously for problem 3 just plug the number in
lazy e.e
btw it's D, for problem 3
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spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:32 PM |
ill start posting screenshots
https://gyazo.com/63256d2390ae89c21c0919f03488b4a6
spkoN the god. |
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| 23 Apr 2016 09:32 PM |
yes question 3 is an easy function
plug in each choice as the variable X and the one that works is the answer |
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wishic
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| Joined: 21 Feb 2013 |
| Total Posts: 705 |
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| 23 Apr 2016 09:32 PM |
hyakinthos you should become a cashier
-mutes mic- |
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jacky051
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| Joined: 23 Feb 2012 |
| Total Posts: 3175 |
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| 23 Apr 2016 09:33 PM |
if you want help post the problem
im not going to your links
children nowadays, my god
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| 23 Apr 2016 09:34 PM |
hi jakey
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spkoN
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| Joined: 29 Jan 2016 |
| Total Posts: 383 |
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| 23 Apr 2016 09:34 PM |
dude just go to the link damn trust me
https://gyazo.com/63256d2390ae89c21c0919f03488b4a6
it wont let me copypaste the question
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