anonymous
  • anonymous
90/5+4*2-1=19? how do I do this?!
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
take it daniel and rsvitale
anonymous
  • anonymous
90/5+4*2-1 is equal to 25 not 19. 90/5=18, (4*2)-1=7, 18+7=25. Can you tell us what the question was asking exactly?
anonymous
  • anonymous
GUYS I NEED AN ANSWER FAST!

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anonymous
  • anonymous
90/(5+4) = 10 10*2 -1 =19
anonymous
  • anonymous
Thats the question, I have to figure out that equation...
anonymous
  • anonymous
oh you need to use parenthesis Mia
anonymous
  • anonymous
Yeah Can you help?
anonymous
  • anonymous
it should be written ((90/(5+4))*2)-1. This is equal to 19. I used more parenthesis than necessary to be clear.
anonymous
  • anonymous
Thanks SOOO much
anonymous
  • anonymous
I need help now on solving it
anonymous
  • anonymous
ok first we add 5 and 4 to get 9. so 90/(5+4)=90/9=10. Then we take that piece and multiply it by 2. 2*10=20. Finally we subtract 1. 20-1=19
anonymous
  • anonymous
the parenthesis indicate order of operations
anonymous
  • anonymous
does that make sense or do you have any questions?
anonymous
  • anonymous
Yep, that makes perfect sense... um lemme check hang on
anonymous
  • anonymous
By inserting one pair of parenthesis at different places in 100-3^2+5*4-6/2 find as many different ways of evaluating the expression as you can.
anonymous
  • anonymous
ok i think there are many ways to get a different answer. (100-3)^2+5*4-6/2, 100-3^2+(5*4-6)/2, (100-3^2+5*4-6)/2, are several groupings that give different answers. try to think of some more.
anonymous
  • anonymous
the parenthesis make a big difference; for example 100-3^2=91 but (100-3)^2=9409
anonymous
  • anonymous
Oh yeah....i see..
anonymous
  • anonymous
how many more ways are there?
anonymous
  • anonymous
that depends on how it is written. Is the 3^2 actually written with a carat "^" symbol or just as a superscript
anonymous
  • anonymous
there are a bunch of ways to do it if we are just writing it as it's typed but if it is written a certain way in a text book there are less possibilities I would have to know exactly how it was written
anonymous
  • anonymous
the exponent is up in the right corner of the "3"
anonymous
  • anonymous
so not a carat

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