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Post by **Angie** on Oct 20, 2015 17:18:55 GMT
"Use any order, any grouping to write equivalent expressions by combining like terms. Then verify the equivalence of your expression to the given expression by evaluations for the value(s) given in each problem."
The first problem is 3(6a); for a=3
If someone could show me how to do this one, I can figure out the rest.
Thank you for your help. I really appreciate it.
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Post by **Angie** on Oct 20, 2015 17:23:48 GMT
I'm thinking it would be 3(6*3) 3*18 54
Am I correct in thinking the "for a=3" is just a clue to figure out the problem?
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Post by blueeyedpups on Oct 20, 2015 19:51:24 GMT
I think you missed the first part of the problem..."Use any order, any grouping to write equivalent expressions by combining like terms."
That would be to show that you can change the order of the equation around and still end up with the same answer.
a(3x6) 3(18) 54
OR
6(3a) 6(3x3) 6X9 54
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Post by **Angie** on Oct 20, 2015 21:08:46 GMT
Thanks for the answer. The teacher replied to ds' email and told him pretty much the same thing. Now, if a problem says 2(-t) and t=-5, then the problem would be 2 times what? I say the two negatives cancel each other out so the problem is 2(5) =10. Ah, relearning pre-algebra....so much fun. Not!
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Post by monklady123 on Oct 20, 2015 21:13:35 GMT
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Post by littlemama on Oct 20, 2015 21:18:31 GMT
Those instruction are ridiculously complicated for a relatively simple.problem.
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ddly
Pearl Clutcher
Posts: 3,947
Jul 10, 2014 19:36:28 GMT
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Post by ddly on Oct 20, 2015 21:26:25 GMT
Thanks for the answer. The teacher replied to ds' email and told him pretty much the same thing. Now, if a problem says 2(-t) and t=-5, then the problem would be 2 times what? I say the two negatives cancel each other out so the problem is 2(5) =10. Ah, relearning pre-algebra....so much fun. Not! Yes. 2 negatives next to each other become a positive. 2(--5)=2(+5) lisa D.
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Post by lorieann13 on Oct 20, 2015 22:16:16 GMT
Thanks for the answer. The teacher replied to ds' email and told him pretty much the same thing. Now, if a problem says 2(-t) and t=-5, then the problem would be 2 times what? I say the two negatives cancel each other out so the problem is 2(5) =10. Ah, relearning pre-algebra....so much fun. Not! Yes. 2 negatives next to each other become a positive. 2(--5)=2(+5) lisa D. Isnt 2(-5) saying 2 × -5 = -10? If it was -5 squared (small 2 on top) it would be positive 25
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Post by lorieann13 on Oct 20, 2015 22:17:44 GMT
Thanks for the answer. The teacher replied to ds' email and told him pretty much the same thing. Now, if a problem says 2(-t) and t=-5, then the problem would be 2 times what? I say the two negatives cancel each other out so the problem is 2(5) =10. Ah, relearning pre-algebra....so much fun. Not! Where do you see 2 nevatives? Unless it is supposed to be -2(-5) then yes a positive 10, but if 2(-5) its -10
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Post by littlemama on Oct 20, 2015 22:19:09 GMT
Yes. 2 negatives next to each other become a positive. 2(--5)=2(+5) lisa D. Isnt 2(-5) saying 2 × -5 = -10? If it was -5 squared (small 2 on top) it would be positive 25 But that's not what it says. It says two times the opposite of t. t= -5, so the opposite of that is 5.
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Deleted
Posts: 0
May 18, 2024 22:12:19 GMT
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Post by Deleted on Oct 20, 2015 22:34:09 GMT
Isnt 2(-5) saying 2 × -5 = -10? If it was -5 squared (small 2 on top) it would be positive 25 It's 2(-t) where t=-5, so it's 2(-(-5)) which equals +10. Sneaky extra negatives!!!
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Deleted
Posts: 0
May 18, 2024 22:12:19 GMT
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Post by Deleted on Oct 20, 2015 23:03:32 GMT
My answer
Math solve your own problems , I got some of my own to deal with.
Don't you wish you could really write that on a paper?
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Post by **Angie** on Oct 21, 2015 0:32:10 GMT
Thanks for the answer. The teacher replied to ds' email and told him pretty much the same thing. Now, if a problem says 2(-t) and t=-5, then the problem would be 2 times what? I say the two negatives cancel each other out so the problem is 2(5) =10. Ah, relearning pre-algebra....so much fun. Not! Where do you see 2 nevatives? Unless it is supposed to be -2(-5) then yes a positive 10, but if 2(-5) its -10 I see 2(-*-5).
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Post by **Angie** on Oct 21, 2015 0:34:04 GMT
Those instruction are ridiculously complicated for a relatively simple.problem. I know! As soon as someone told me the answer, I could figure out all of ds' problems. And drive him crazy when I finish before him.
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Post by **Angie** on Oct 21, 2015 0:36:10 GMT
My answer Math solve your own problems , I got some of my own to deal with. Don't you wish you could really write that on a paper? The worksheet proudly says it is from NYS Common Core Curriculum. I told him to put "purple toadstool". He was not amused.
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Deleted
Posts: 0
May 18, 2024 22:12:19 GMT
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Post by Deleted on Oct 21, 2015 0:59:44 GMT
Those instruction are ridiculously complicated for a relatively simple.problem. I think the math teacher needs to go back to english classes
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Post by **Angie** on Oct 21, 2015 2:13:18 GMT
Those instruction are ridiculously complicated for a relatively simple.problem. I think the math teacher needs to go back to english classes I'm thinking he had a substitute. His math teacher has never sent anything like this as homework.
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Post by 950nancy on Oct 21, 2015 2:18:01 GMT
17! My answer to all math problems.
I think the directions were written this way because this is how questions are asked on assessments for Common Core. Show all of the ways possible.
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Deleted
Posts: 0
May 18, 2024 22:12:19 GMT
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Post by Deleted on Oct 21, 2015 2:21:11 GMT
I used to teach pre algebra and those are some crazy instructions. I told a student once that he was the type of kid that would answer the questions about a train leaves Chicago at 9am and travels 75mph and then the second train leaves New York at such and such a time? When do they meet. He would write I don't care I drove a car. There are a lot of those common core math things where I think the kids should just write purple unicorns.
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seaexplore
Prolific Pea
Posts: 8,430
Apr 25, 2015 23:57:30 GMT
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Post by seaexplore on Oct 21, 2015 3:11:31 GMT
My answer Math solve your own problems , I got some of my own to deal with. Don't you wish you could really write that on a paper? The worksheet proudly says it is from NYS Common Core Curriculum. I told him to put "purple toadstool". He was not amused. Is this Engage NY curriculum? I taught that rubbish last year! Thank GOD we got good stuff to use this year! I DESPISE Engage! It's horrid for even teachers to figure out what the heck it's asking to be done. You have to possess a phd in math to understand the teacher side of it! Nuts!
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Post by **Angie** on Oct 21, 2015 10:58:55 GMT
Yep. Their math curriculum is Math Connects and it is a pretty decent program. Usually their homework is from the workbook or sheets that she wrote out with "normal" explanations. This sheet was completely new.
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Deleted
Posts: 0
May 18, 2024 22:12:19 GMT
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Post by Deleted on Oct 21, 2015 15:12:55 GMT
I have no idea, but math homework is probably one of my biggest fears with having kids!!
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Post by monklady123 on Oct 21, 2015 17:40:31 GMT
I have no idea, but math homework is probably one of my biggest fears with having kids!! I've always said that "math ability" ought to be included in these assessment things we do when we go to engagement encounter things, or general pre-marriage counseling. If both people are bad at math then the marriage can't happen. Thankfully for me, since math wasn't part of the Engaged Encounter weekend dh and I went to, dh is excellent at math.
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Post by missmiss on Oct 21, 2015 17:49:06 GMT
Please make sure you substitute correctly by using parenthesis when doing this.
2(-t) when t = -5
2(-(-5)) 2(5) 10
I tell you this because when you you have something like
2(-x^2) t = -5
2(-(-5)^2) 2(-25) -50
-2^2 and (-2)^2 are not the same thing -4 4
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Deleted
Posts: 0
May 18, 2024 22:12:19 GMT
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Post by Deleted on Oct 21, 2015 17:58:28 GMT
I have no idea, but math homework is probably one of my biggest fears with having kids!! I've always said that "math ability" ought to be included in these assessment things we do when we go to engagement encounter things, or general pre-marriage counseling. If both people are bad at math then the marriage can't happen. Thankfully for me, since math wasn't part of the Engaged Encounter weekend dh and I went to, dh is excellent at math. All I know is that there will be no shame in my game to send a note in with DS saying his mom is mathematically challenged and he really did try. Now, English, Lit, Science and History, I've got down!
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ddly
Pearl Clutcher
Posts: 3,947
Jul 10, 2014 19:36:28 GMT
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Post by ddly on Oct 21, 2015 18:11:21 GMT
Yes. 2 negatives next to each other become a positive. 2(--5)=2(+5) lisa D. Isnt 2(-5) saying 2 × -5 = -10? If it was -5 squared (small 2 on top) it would be positive 25 I put the -5 in the parenthesis replacing the t making it --5 also making it positive. The answer would be 10.
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Post by missmiss on Oct 21, 2015 22:07:58 GMT
You can't put the negative in the parenthesis like you did. If you were to have:
-x^2 (negative x squared) when x = -5 it would be
-(-5)^2 (negative times the quantity of negative 5 squared)
-(25)
-25
I understand there isn't an exponent in this problem but there will be down the road in a math class. Just want to make sure it is done correctly. Those two negatives side by side do not make a positive in the example above because you have to follow order of operations first.
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Post by meridon on Oct 22, 2015 1:25:54 GMT
Get the free app called Photomath!!!!!! You download the app and then scan the problem as if you were going to take a picture of it and it solves it for you and shows you the steps. Total game changer for math homework around here! Photomath link There's a demo video to show how it works.
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PLurker
Prolific Pea
Posts: 9,744
Location: Behind the Cheddar Curtain
Jun 28, 2014 3:48:49 GMT
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Post by PLurker on Oct 22, 2015 1:29:33 GMT
I used to actually like math but now I am so far removed (aka-old!) it can hurt my brain.
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Post by **Angie** on Oct 22, 2015 1:30:21 GMT
Get the free app called Photomath!!!!!! You download the app and then scan the problem as if you were going to take a picture of it and it solves it for you and shows you the steps. Total game changer for math homework around here! Photomath link There's a demo video to show how it works. A friend recommended Photomath. It wouldn't do half of the problems. Lol
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