how many multiples of 5 between 25 and 750 inclusively and show the formula

which formula am I suppose to use? Sn=a(1-Rn)

----------                                                                                1                                                                             1-R

0  Views: 2908 Answers: 3 Posted: 10 years ago
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N = (max - min)/k+1

25 and 105 are divisible by 5. So.....................

105 - 25 = 80/5 = 16 + 1 = 17

Bob/PKB

You used 105 instead of 750, but your logic is perfect.

I think you should divide 750 by 5  (150) and subtract 4, because you are not going to include the 5 10, 15, and 20, which are multiples of 5 and not included in your parameters of 25 - 750
There are 20 multiples of 5 in every 100, so 20 x 7 = 140 multiples between 0 and 750.  There would be 1/2 (20) because 50 is half of 100, and you need to add another 10 multiples.  That gives you 150 multiples multiples of 5 between 0 and 750.  Now, subtract the 4, and you get 150-4 = 146

I'd write the equation like this:   [(20 x 7) + (10 x 1)] - 4 = [140 + 10] - 4 = 150 - 4 = 146

or, using Chellanne"s formula:  (750 - 25)/5  + 1= 725/5  + 1= 145 + 1 = 146

itsmee

In the third grade I had a stinky, old, red math book. At that time, I hated the book. Really. I turned off to math at that time. Somehow I got through Algebra ... but I didn’t go further.
I think you are soooo smart! Congratulations.
Now we have something new with Tech every day. (Or at least I do.)
Bob/PKB

I am not that smart, itsmee. Muddling thru pre-algebra as a sub and my sons' homework gave me a better understanding. No math for me since algebra 1 back in 1970
chelleanne

Thanks, for mistake!

Homework Help. You can ask any homework questions ,and many teachers will help you to answer it >> http://homework.boodom.com/

Deleted User

This is silly Colleen I have no votes left but n an TD ? Why is that?
Colleen

Why is what? The TD? Why did you give me and Python a TD?
Deleted User

It happened by accident when I was reading pythons comment and I realised I have no votes so ow can I TD if I have no votes? I was showing you on a SEPERATE post as an example..
Colleen

Having no vote ups left does not take away from the TDs you have left.

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