Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing

This Question is Closed

mykoBest ResponseYou've already chosen the best response.0
you have the solution with the explanation, so what else do you need?
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
I have a sample problem. I've tried applying the steps to the actual problem but it's confusing.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
So instead of substituting 6 and 1 into the v's, you'll substitute 5 and 2.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
The substitution takes place at the part where the expression is in square brackets. [ ]
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
You'll plug in 5 first and evaluate. Keep that answer on the side somewhere. Then you'll go back to the square brackets again, plug in 2 and evaluate. Whatever you get as the answer, you'll subtract that from the answer you got when you plugged in 5.
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
Can you wait while I do it, and tell me if it's correct?
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
I got 77.5 when I plugged in 5.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
There's an extra negative sign next to the red negative sign. Ignore the extra one.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
\[{3(5)^{2}\over 2}+6(5)\]
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
Okay, so if I plug in 1, I'll get 3/2+8 = 6.5
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Look at the equation I wrote above.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
What do you get when you evaluate that expression?
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
Oh, I forgot to square it.
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
Then I get: (7.5+4.5)  (3/2 +8) = 9.5 or 19/2.
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
It's not correct though.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
You're doing more than what it's asking for. The only values you're evaluating are 5 and 2. Not 6 and 1.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
6 and 1 are solely used in the example.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
You never answered my question. What do you get when you evaluate the expression I wrote above?
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Awesome. Now imagine the 5 is gone and a 2 is in its place in the expression above. What do you get now?
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Replace BOTH 5s with 2s. Not just the one on the left.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Perfect. Now the last step is subtracting that 6 from 7.5: 7.5  6 =
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
But if you look at the sample problem, they subtracted another part too.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
They subtracted the value of the expression when a 1 was plugged in. We subtracted the value of the expression when a 2 was plugged in.
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
I got 8 and it's still wrong.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
8 on which problem?
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Ugh. It's + 8 not +6
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
\[{3v ^{2} \over 2}+8v\]
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Answer: 7.5 or 15/2
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Sorry. I thought the expressions were the same in the example and actual problems.
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
It's okay. Can you help with another problem?
 one year ago

hiralpatel121Best ResponseYou've already chosen the best response.0
If you're not busy?
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Start off exactly as the example starts by dividing u and 4 by the square root of u. This gives you: \[\int\limits_{1}^{9}u ^{1/2}4u ^{1/2}\]
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Then integrate each term.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
\[[{2 \over 3}u ^{3/2}8u ^{1/2}]\]
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Plug in 9 first, and evaluate. Plug in 1 afterwards, then evaluate. Subtract the second answer from the first one.
 one year ago

coreylvaughnBest ResponseYou've already chosen the best response.1
Take care and don't forget to mark a Best Response. Thank you
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.