Destroyer (math) #148 and #152

[Hope30]

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So guys, I went through 153 questions of math from Destroyer today, and they're driving me nut, especially #149 (edit: not 148) and #152. I'm not sure. I am so freaking stress right now (it is 1:30 am f*). I know how to do #152, but to solve it, it requires at least 5+ mins. Is something like #152 be possible to be on the real Dat math. Also, #149, I have no idea what is going on: well, more like what is the purpose?....CRAZY (stress)..😡😴 Well, I have finished the whole Destroyer one time now. Time for the second try. Still practice tests to go. 2 weeks til real DAT. s*

 

[toothhornet88]

So guys, I went through 153 questions of math from Destroyer today, and they're driving me nut, especially #149 (edit: not 148) and #152. I'm not sure. I am so freaking stress right now (it is 1:30 am f*). I know how to do #152, but to solve it, it requires at least 5+ mins. Is something like #152 be possible to be on the real Dat math. Also, #149, I have no idea what is going on: well, more like what is the purpose?....CRAZY (stress)..😡😴 Well, I have finished the whole Destroyer one time now. Time for the second try. Still practice tests to go. 2 weeks til real DAT. s*

can you type what the problem say and I'll help you out, I have the 2009 destroyer so i dont think i have them

 

[Hope30]

can you type what the problem say and I'll help you out, I have the 2009 destroyer so i dont think i have them

#152, The temperature for the first week of the month of Jan. were recorded as follows: 5C, 10C, 15C, 8C, 13C, 17C, 9C. What is the mean and standard deviation of the set of data?
Well, I know how to do this, so you guys don't have to answer this. My question is can something like this be possibly on the real DAT. Mean is easy, but standard deviation requires mins.

#149, what is the product of the second and third term of the expansion (3x-2y)^5?
answer: -874,800x^7y^3
This is where it gets me. I look at the explanation. It is CRAZY. DO NOT understand the basic concept of it.

THANKS

 

[Demps]

#152, The temperature for the first week of the month of Jan. were recorded as follows: 5C, 10C, 15C, 8C, 13C, 17C, 9C. What is the mean and standard deviation of the set of data?
Well, I know how to do this, so you guys don't have to answer this. My question is can something like this be possibly on the real DAT. Mean is easy, but standard deviation requires mins.

#149, what is the product of the second and third term of the expansion (3x-2y)^5?
answer: -874,800x^7y^3
This is where it gets me. I look at the explanation. It is CRAZY. DO NOT understand the basic concept of it.

THANKS

yea same. 152 is okay I guess. It will eat up some time, but you can definitely get it right.

I lost my words for #149 lol. I had the same type of question on topscore set#2 and I gave up on it.

 

[Vsno123]

Hey guys! I was completely lost when I came to this question too, but it's actually not too bad...just a little annoying. It's hard to explain it here, so just watch this video. It really helped me!

http://www.youtube.com/watch?v=ktDy4ExrctQ

and if you go to the next video, it shows you how to use Pascal's triangle (only used with small coefficients). type in Binomial Expansion : Pascal's Triangle : ExamSolutions

 

[toothhornet88]

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[Hope30]

Lol im at starbucks, and they have poor connection. I only get to watch half of the video, and it is priceless. Love the accent. I will finish watching once i get home. Thanks. 👍

 

[Vsno123]

Lol im at starbucks, and they have poor connection. I only get to watch half of the video, and it is priceless. Love the accent. I will finish watching once i get home. Thanks. 👍

That's what I thought too..the accent is quite awesome lol. glad it helped!