Top answers

What is the difference between an ionic and a covalent bond?

A chemical bond joins two atoms together. In covalent bonding, atoms are joined by sharing electrons. For example, water (H 2 O) is created through two OH bonds in each of which, Oxygen and Hydrogen give an ...
CS
Answered by Claudia S. • Chemistry tutor
3183 Views

When should I use the imperfect to talk about the past in French?

One situation where the imperfect should be used is when giving descriptions of the past - how something or someone used to be. For example, if I wanted to say that the weather was nice yesterday, I would sa...
JM
Answered by Jacob M. • French tutor
2486 Views

Why don't verbs always agree with the subject in the perfect tense?

The simple explanation is this: it depends on which auxiliary is being used ("avoir" or "être"). When using "être", the verb always agrees with the subject. For example: "I...
DG
Answered by Daniel G. • French tutor
2344 Views

Find the value of roots of the quadratic: x^2-13x=30

First rearrange the equation so the LHS is equal to Zero:X 2 -13x-30=0Then find the factors of -30:-1,30/1,-30-2,15/2,-15-3,10/3,-10-6,5/6,-5Chose the factor pairs which add to equal -13which is 2 and -15.Cr...
TZ
Answered by Tabonga Z. • Maths tutor
3844 Views

Solve ((6+x)/2) + ((2-3x)/3) = 31/6

To solve this first we need to simplify the equation by multiplying the denominators by a common factor. If we multiply both sides of the equation by 6 we shall get an equation that is expressed with denomin...
EJ
Answered by Ellis J. • Maths tutor
4399 Views