Search our library of GCSE questions

Top answers

All subjects

GCSE

You read this comment in a magazine. 'Oggi mi rendo conto che, in realtà, il problema più grosso è che ci sono troppe macchine in centro. Non c’è una zona pedonale e l’aria è molto inquinata.' Which problem is mentioned?

A. Traffic accidents B. Noise pollution C. Air pollution - C is the correct answer.

Answered by Riccardo D. • Italian tutor

3021 Views

Solve 0=X^2 +5x +4

0= (x + 4)(x + 1)

x= - 4

x= - 1

Answered by Rebecca W. • Maths tutor

3046 Views

Does reactivity increase or decrease as you go down group 7?

Reactivity will decrease as you travel down group 7 in the periodic table. Group 7 elements need to gain an electron to become stable as they need 8 electrons in their outer shell. Group 7 elements only c...

Answered by Rebecca W. • Chemistry tutor

16089 Views

Show that (4x – 5)^2 – 5x(3x – 8) is positive for all values of x

(4x-5)^2-5x(3x-8)

(16x^2-40x+25)-(15x^2-40x)

16x^2-15x^2-40x+40x+25

x^2+25

if x = positive, x^2 will be positive.

if x = negative, x^2 will be positive.

x^2 is po...

Answered by Joseph M. • Maths tutor

3904 Views

GCSE Chemistry- Describe the structure of an atom?

Atoms have a small nucleus surrounded by electrons. The Nucleus- It is in the middle of the atom It contains protons and electrons Protons are positively charged +1 Neutrons have n...

Answered by Umair I. • Chemistry tutor

2680 Views