What is the value of A when r=9 in inverse proportions

3.6 and 2

Step-by-step explanation:

Given R is inversely proportional to A then the equation relating them is

R = ← k is the constant of proportion

To find k use the condition R = 12 when A = 1.5, that is

12 = ( multiply both sides by 1.5 )

18 = k

R = ← equation of proportion

(a)

when A = 5, then

R = = 3.6

(b)

when R = 9, then

9 = ( multiply both sides by A )

9A = 18 ( divide both sides by 9 )

A = 2

ljn

step-by-step explanation: