y is inversely proportional to x. y = 0.04 when x = 80. Find the value of y when x = 32.

If y is inversely proportional to x. We know that y=k/x for some constant k. We need to find this constant before continuing. Looking at the information given to us in the question we know for one example that y=0.04 when x=80, plugging this into our expression we have 0.04=k/80, rearranging gives us k=0.04*80, so k=3.2. Now we have k we can proceed. We have the value of k and the value of x, and by plugging them in to our expression we have y=3.2/32, so y=0.1.

Answered by Tyler T. Maths tutor

6016 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

Work out the value of 27 ^-2/3


If a student wishes to have a ratio of 2:7 red pens to yellow pens in their pencil case: a) if they have 50 pens total what is the maximum amount they can carry with them b) if they have 18 red and 31 yellow what is the maximum amount they can carry


Factorise and solve the quadratic equation x^2 + 6x + 8 = 0


Sam is a bodybuilder. He currently weighs 90kg, but is aiming to be at 130kg in the next four months. Every month, he puts on 8% of his weight. Does he reach his target?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo
Cookie Preferences