Thursday
December 18, 2014

Homework Help: maths, variations checking!

Posted by hayley on Tuesday, December 18, 2007 at 5:57am.

question: given that y is inversely proportional to (x-1),

A) express y in terms of x and a constant k
b) give that y=5 when x=3, find x when y=25

answer: A)y=-k(x-1)
y=-kx+k

B)y=5, x=3, k(constant)=3x5
k=15
25=-15x+15
10=-15x
x=-10/15

is this correct? i'm not too sure about this variation thing, i would appreciate your help!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

maths, variations - question: if y is proportional to x, and that y=6 when x=12...
math - A varies directly as x and B is inversely proportional to x^2. Given that...
maths - can you explain to me how to do this question i know i have to use ...
SAT math - Can someone please help me with this question: Write an equation that...
math - i posted this can you explain to me how to do this question i know i have...
math - i posted this can you explain to me how to do this question i know i have...
math please help - i posted this can you explain to me how to do this question i...
Inverse Variation - Help me please.. Explain also :( 1. E is inversely ...
Calc - Find the constant of proportionality for the following situation: "y is ...
Pre Calc (question was never answered) - Write the statement as a power function...

Search
Members