Top answers

All subjects
GCSE

Solve these simultaneous equations. 2x + y = 10 and 3x + 4y = 25.

2x + y = 10 (1)

3x + 4y = 25 (2)

1. Eliminate y.

Method 1:

(1) x 4:

DD
Answered by Daisy D. Maths tutor
11522 Views

When should I use the quadratic formula?

If you're asked to solve a quadratic equation, you could factorise it, or you could use the quadratic formula. The quickest way is to factorise, but sometimes the numbers are too tricky to factorise, (...

SM
Answered by Sarah M. Maths tutor
3498 Views

'ei' or 'ie'?

German spelling can be tricky to get to grips with when you first start learning, but there's a simple trick to remembering whether the word you're writing is 'ei'  (e.g. 'bleiben') or 'ie' (e.g. 'spie...

AH
Answered by Anita H. German tutor
3454 Views

When do I use 'sein' and when do I use 'haben' in the past tense?

The rule for this is simple, although can be somewhat confusing when you first start learning German! The rule is: if there's movement from one place to another, use 'sein'. If there's not, use...

AH
Answered by Anita H. German tutor
49539 Views

What is osmosis and why does it occur?

Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a partially/selectively perme...

AH
Answered by Anita H. Biology tutor
43681 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