Melody

chewychewy:

can anyone give me a brief explanation on dividing algebraic expressions?

mathcalc:

Paul has 2/3 as many postcards as Shawn. The number of postcards Shawn has is 3/5 of the number of postcards Tim has. If the three boys have 280 postcards altogether, how many post card s does Tim have than Paul?

Please no algebra! I haven't learned it yet.

jyotig:

Class A folds 160 fewer paper cranes than class B and 2/3 as many paper cranes as Class C. Class B folds 92 more paper cranes than class C. How many cranes does class B fold?

Need a method, not an answer. No Algebra!

Guest:

cos-1 -2.347

Stu:

Yeh, I knew it was simple. lol. I even went over this yesterday in a different example to flip the fraction which came to me after posting. Thanks for the reply. lol. Still have to absorb it, enough to remember all, apply as needed and enough to do method in reverse. It's a slow process when it's all new.

Nice wiki link.

trigonometry:

How to prove that Cos2A=17/25 showing all step