Math Is Fun Forum

you cracked the whole puzzle up! explained everything in my teacher's solution! gd job. that's practically the so-called strategy

what i meant was that should all 13 cross at 1 time or in groups? in reality the plank could squeeze up to 6 people.

√-1 should be i. but if u have i²=-1, then √-1 should either be i or -i.

goes?

woops!i must have been tired. sorrrryy!! how did u change the color of the letters?

Density=Mass/Volume

Volume of cylinder=πr²h     where π= pi (3.141.....), r= radius, and h= height

Hope that helps.

hmm. ok. my purpose of my 1st post was to confirm my answer for this qn....(very simple one)

3≤ x≤ 7,-5≤ y≤ 2. x and y are integers.

a) Find the greatest possible value of x² -y²
b) Find the smallest possible value of xy
c) Find the smallest possible value of

part a is where i was stumped

thanks. but in school, which statement do we follow, 0 integer or not?

this LaTex language is only for this forum right?
you can't use it on other applications like microsoft word?

by the way this program is extremely useful