Search our library of GCSE questions

Top answers

All subjects

GCSE

How should I structure an essay on an unseen prose extract?

You should begin by reading the extract a couple of times. Afterwards you should read it through again but this time you could attempt to annotate the extract whilst thinking about the form, structure and...

Answered by Flora L. • English Literature tutor

10694 Views

Solve the simultaneous equations, x^2+y^2=41, and y=2x-3

STEP 1) First, substitute 2x-3 into the quadratic equation, replacing y, which works out as x²+(2x-3)²=41STEP 2) Now, expand the bracket, (2x-3)

Answered by Hannah N. • Maths tutor

6648 Views

The line y = 3x-4 intersects the curve y = x^2 - a, where a is an unknown constant number. Find all possible values of a.

For the line and the curve to intersect we need the for the following system of equations to have a solution. y = 3x AND y = x² - aThe solutio...

Answered by Hasnat K. • Further Mathematics tutor

3873 Views

A point A lies on the line y = 2x^2 - 8x + 2. A has y-coordinate (-4). Find all possible values for the x-coordinate of A.

The point A = (x', y') lies on the line y = 2x² - 8x +2. And we are given that y' = -4.Therefore we have tha...

Answered by Hasnat K. • Maths tutor

2855 Views

50.0 g of propene reacts with hydrochloric acid to produce 1-chloropropane. Calculate the percentage yield if only 54.0g is made.

STEPS:Write the equation CH3CHCH2 + HCl -> CH3CH2CH2Cl + H2 (where 1-chloropropane made by electrophilic addition reaction)Identify number of moles of propene used. So number of moles is m/ Mr= 50.0g ...

Answered by Ravinder K. • Chemistry tutor

3100 Views