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Factorise X^2 + 13x + 42; from this, please give the answer to X^2 + 13x + 42 = 0

This question aims to look at quadratic equations. We factorise Quadratic equations into two sets of bracketsFirst, we are dealing with X 2 . X 2 is formed from X multipled by X, so each bracket should conta...
KA
Answered by Khalid A. • Maths tutor
6239 Views

An ice cube with a small iron ball in its centre is placed in a cup of water. 3.9 x 10-3kg of water in the cup is displaced and the volume of the ice cube is 4.0 x 10-6m3. Ice density: 1000 kg m-3 Iron density: 7800 kg m-3, what is the volume of the iron?

Firstly you need to know that the weight/mass of water displaced by the cube is equal to the weight/mass of the ice cube: 3.9 x 10 -3 kg You then need to recognise that the weight of the cube is the weight o...
AC
Answered by Adam C. • Physics tutor
10933 Views

How is a spit formed?

I always feel it is best for GCSE students to revise off mark schemes. With the formation of a spit being a recurring question in papers, mark schemes will be foundational to enhancing the student's understa...
JA
Answered by James A. • Geography tutor
11680 Views

How should an Oxbridge personal statement be different from others?

Whilst you will send the same personal statement to all the universities you apply for, if you are applying to Oxford or Cambridge the personal statement you submit may be a bit different to your peers. Ther...
MS
2756 Views

When do you use the imperfect tense?

The imperfect tense is a past tense that describes how things used to be, what used to happen and is used to give opinions about past events . It describes an ongoing action in the past or something that use...
RM
Answered by Roisin M. • French tutor
2593 Views