The variables x and y are related by y = 5^x. How do I find the value of x when y is set to 15?

15 = 5^x, we can easily solve this equation by using logs on either side which will give us: log15 = x log 5. Then by solving this for x, we get the result of 1.68 to two decimal places.

AB
Answered by Andrea B. Maths tutor

3438 Views

See similar Maths A Level tutors

Related Maths A Level answers

All answers ▸

how to integrate by parts


Find the turning point of the line y = x^2 + 2x -1


Find the first three terms in the binomial expansion of (8-9x)^(2/3) in ascending powers of x


What is the integral of ln(x)? Hint: use parts for this integration


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning