90/5+4*2-1=19? how do I do this?!

- anonymous

90/5+4*2-1=19? how do I do this?!

- schrodinger

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- anonymous

take it daniel and rsvitale

- 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

GUYS I NEED AN ANSWER FAST!

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## More answers

- anonymous

90/(5+4) = 10
10*2 -1 =19

- anonymous

Thats the question, I have to figure out that equation...

- anonymous

oh you need to use parenthesis Mia

- anonymous

Yeah Can you help?

- 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

Thanks SOOO much

- anonymous

I need help now on solving it

- 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

the parenthesis indicate order of operations

- anonymous

does that make sense or do you have any questions?

- anonymous

Yep, that makes perfect sense... um lemme check hang on

- 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

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

the parenthesis make a big difference; for example 100-3^2=91 but (100-3)^2=9409

- anonymous

Oh yeah....i see..

- anonymous

how many more ways are there?

- anonymous

that depends on how it is written. Is the 3^2 actually written with a carat "^" symbol or just as a superscript

- 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

the exponent is up in the right corner of the "3"

- anonymous

so not a carat

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