IDNStudy.com, kung saan ang iyong mga tanong ay may malinaw na sagot. Alamin ang mga detalyadong sagot sa iyong mga tanong mula sa aming malawak na kaalaman sa mga eksperto.

waaaahhh !!! pa-help naman po ng assignment ko kailangan ko lang po talaga...pls. help me with this guys!


#1.    W varies jointly as x and y inversely as v² and W=1200 when x=4, y=9 and v=6. Find W= when x=3, y=12 and v=9



#2. Supposed P varies diectly as s³. If P=3/4 when b=6 and s=2. find b when p=6 and s=4



pa-help po nito ! thankies~


Sagot :

W varies jointly as  x & y and inversely as v²
so the expression is
 W = k.xy/v²            /    k  = constant
to solve this kind of problem we must find the constant k first
1200 =  k( 4 . 9)/6²
k 1200
W = 1200 .(3 . 12 )/9²        /just plug in the new values
     = 1200 . 36/81
      ~ 533.3

do you mean  P varies directly as s³ & inversely as b
so the expression is
  P =  k s³/b
3/4 = k 2³/6
3/4 = k 8/6
k = 3/4*6/8= 9/16

6 =  (9/16 . 4³)/b
b = ( 9/16 . 4³)/6
b =    6