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LOL! But wouldn't it get boring after a week? :)

Well you can do it! Im in 6th grade and i TRY  to help people. (not always 100%) 

You are correct! Ty very much! I like your strategy I have never thought of it before! But why do we do 7!*3!? Could you please explain? Ty!

First find the circumference    pi x d   = pi 2r  = pi *6     or   6pi inches  

6pi inches  /rev   x   7.3 rev / 6 sec  =    (6pi *7)/6  in/sec  = .......   in/s

You might be right. I'm just a clueless eighth grader looking to help people.

No, each subcommitee contains 3 seventh or eighth graders, so for seventh graders there would be 2 subcommittees, so a total of 6 seventh graders, but there are 4 kids left out, so you would put 2 extra in each subcommitee.

For the eighth graders, you would put 2 subcommittees and put 1 extra kid in each group.

Divide the coefficient of the x-term by 2 and square the answer:

     (-5/2)²  =  25/4

Hello Altshaka!

Total subcommittees = Seventh Grade Group * Eighth Grade Group

Seventh Grade Group = choosing 3 seventh graders out of 10.

\({10 \choose 3}=\frac{10!}{7!3!}=120\)

Eigth Grade Group = choosing 3 eighth graders out of 8

\({8 \choose 3}=\frac{8!}{5!3!}=56\)

Total subcomittees = 120 * 56 = 6720

 - I'm not so sure if this is correct, but this is my attempt on the problem.

Last  one

7 revs  =   14 pi   rads

Distance  / Rate  = Time

14 pi                        14

_________   =       ______  =    14  (9 / 32)  ≈     3.9  min

(32/ 9) pi                 (32/9)

unclear what   sin (x2)   means        sin² x       or     sin (2x) ?

here is what   5 sin (2x) - 3 looks like

https://www.desmos.com/calculator/gquhhxwygo

Wait so i think what you mean is that you want me to have 5 seventh graders and 5 eigth graders?

Be all safe!

Second  one

We  can  use  the  Law of Cosines, here

distance  =   √ [   60^2  +  115^2  - 2 ( 60)(115)  cos (130°) ]   =  √ 25695  ≈  160.3 ft

I'm not exaclty sure how to do this but: 2 seventh grader sub committees but put 2 extra seventh graders in each group.

Then for the eighth graders: make 2 subcommittees and put one of the extra eight graders in each subcommittee.

You may find my "stradegy" a bit confusing, so ask me if you need me to explain it. 

sin (- θ)  = -sin θ

tan (-θ)  = - tan θ

So  we  have

(-sin θ)  ( -tan θ)

_____________  =

       sec θ

sin θ  (sin θ  / cos θ)

________________   =

        1 / cos θ

sin^2 θ

Be safe too and also have a nice day! 

a=100000;d=a;c=0;p=0;cycle:b=divisor(a);c=c+1;a=a/b;if(a>=b, goto cycle, 0);if(c==15, goto loop,goto next);loop:printd," ",;p=p+1;next:d++;a=d;c=0;if(d<1000000, goto cycle,0);print">>Total =",p 

OUTPUT = 75 such integers as follows:
110592  114688  122880  165888  172032  180224  184320  204800  212992  248832  258048  270336  276480  278528  286720  307200  311296  319488  373248  376832  387072  401408  405504  414720  417792  430080  450560  460800  466944  475136  479232  507904  512000  532480  559872  565248  580608  602112  606208  608256  622080  626688  630784  645120  671744  675840  691200  696320  700416  704512  712704  716800  718848  745472  761856  768000  770048  778240  798720  839808  847872  868352  870912  903168  909312  912384  933120  940032  942080  946176  966656  967680  974848  991232  999424  >>Total = 75

Probability = 4 / 20

                 = 0.2

                 = 20 %

U too

Sum of GP = 8 * [1 - 1.05^9] / [1 - 1.05] =~88 miles

(8, 8.4, 8.82, 9.261, 9.72405, 10.2102525, 10.72076512, 11.25680338, 11.81964355) =88.2125... =~88 miles

Okay! have a good day

I am good thanks 

Which question