Question

If x varies directly as y, and x = 48 when y = 16, find x when y = 5.

Answer 1

ok given :
x directly proportional to y right ?

Answer 2

@aussy123 please be active .. reply

Answer 3

sorry my computer was having problems

Answer 4

no problem .. i have to go may be @Calcmathlete help u

Answer 5

and @UnkleRhaukus

Answer 6

ok thx

Answer 7

@mathslover before you go, isn't the order of x and y backwards?

Answer 8

x:y=48:16=3:1
if 1=5
then 3=15
lolz is this process right ?

Answer 9

well I was doing xy=k...but then I found myself repeating

Answer 10

I'm going to go on a whim that since x and y have reversed positions, the formula is x = ky

Answer 11

Solve for k using the first set of x and y. Then, use k and solve for x using the second y.

Answer 12

http://answers.yahoo.com/question/index?qid=20100523170025AAP6nM6
http://www.algebra.com/algebra/homework/absolute-value/absolute-value.faq.question.147657.html
include some good chances to do a similar type of questions ( solved )
that i did .leads to a right answer .. It is just a method declared by me for the obj. questions but to understand questions properly the process must be right

Answer 13

mathslover your actually correct Im just confused with the concept

Answer 14

x=ky
48=16k
k=3
when y=5:
x=3k = 3*5=15 this is the answer got it ?

Answer 15

thats correct

Answer 16

If x varies directly as y : then x = ky
if y varies directly as x : then y = xk
remember that also

Answer 17

@Calcmathlete is my method correct now ?

Answer 18

I see why It was so confusing for me because I was using xy=k

Answer 19

I believe so. :)

Answer 20

:) np @aussy123 just ask questions here but remember first try then ask as u did ! best of luck

Answer 21

THANK YOU BOTH...this stuff was giving me a serious headache