If y varies inversely as x and x is 6 when y is 13, what is x when y is 8? a) 9.75 b) 3.69 c) 0.27 d) 6.5

Answer with Step-by-step explanation:

We are given that:

y varies inversely as x

i.e. y could be written as:

 for some constant k

or

We are given that:

x is 6 when y is 13

⇒  k=6×13

⇒   k=78

Now, to find x when y=8

⇒ x=9.75

Hence, correct option is:

A) 9.75

answer:   y=2x-3

step-by-step explanation: