Top answers

All subjects
GCSE

Given f(x)= 8 − x^2, solve f(3x) = -28

First substitute (3x) into the equation for f(x), giving f(3x) = 8 - 9x2. This is then equal to -28 and so it is remains to solve the equation 8 - 9x2 = -28. This can be written as 9...

GG
3954 Views

Expand and simplify x(2x+1)(x-3)

First multiply the brackets to get: (2x2 - 6x + x - 3), Simplify to get: (2x2 - 5x - 3), This is then all multiplied by x to get: 2x3- 5x2 - 3x.

GG
Answered by George G. Maths tutor
8833 Views

what forces hold the ions together in an ionic compound?

electrostatic forces between oppositely charged ions.

AJ
Answered by Anushka J. Chemistry tutor
8743 Views

How does vaccination confer immunity to a person?

The dead or inactive form of the pathogen stimulates the adaptive immune system. It forces white blood cells to form antibodies against the pathogen, so that if a future invasion by the same pathogen was ...

AJ
Answered by Anushka J. Biology tutor
2829 Views

Q4: Some small organisms do not have a specialised gas exchange system like humans. Instead they absorb oxygen through their skin. What is this process called? • Transpiration • Respiration • Diffusion • Photosynthesis

The answer is Diffusion.This is random movement of a substance from an area of high concentration (the air) to a region of low concentration (inside the organism). In this case, the substance dif...

RT
Answered by Rebecca T. Biology tutor
3791 Views

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