Top answers

How do signs change in an inequality?

Normal manipulation of inequalities does not affect the direction of the inequality such as: addition subtraction multiplication or division by a positive number, The direction of the inequality will change ...
OZ
Answered by Oscar Z. • Maths tutor
12436 Views

How do I find the cartesian equation for a curve written in parametric form?

Reminder - a cartesian equation is written in terms of x and y (e.g. y = 2x + 3) while parametric equations are written with x and y separately in terms of t. Example: Find the cartesian equation of the curv...
AO
Answered by Alexis O. • Maths tutor
11711 Views

How do I predict the shape and bond angle of an molecule?

Electron pairs arrange themselves so they are as far apart as possible (electron pair repulsion theory). In a covalent compound, the number of electron pairs around the central atom determines the shape of t...
TT
Answered by Tolu T. • Chemistry tutor
16899 Views

Was the Cold War in fact 'cold'?

The war that took place between 1945 and 1991 has been termed the 'Cold War', largely due to the fact that the two main agitators (The Soviet Union and The United States of America) never came into direct co...
IS
Answered by Imogen S. • History tutor
13216 Views

Finding stationary points

Finding stationary points. You can find stationary points on a curve by differentiating the equation of the curve and finding the points at which the gradient function is equal to 0. One way of determining a...
JF
Answered by Jessica F. • Maths tutor
14967 Views