Top answers

Write the number 0.0534 in standard form (1 mark)

5.34 x 10 -2
CT
Answered by Christopher T. • Maths tutor
3843 Views

2x+y=18, x-y=6; Solve the simultaneous equations

2x+y =182) x-y =6(x-y=6) multiply by +22x-2y = 121) 2x+y = 182) 2x-2y=12 -subtract equation 2 from equation 10x-y=6 -Therefore -y=6 so y= -6Put value for y into either of the equation in order to find value ...
SW
Answered by Saskia W. • Maths tutor
5819 Views

Differentiate x^3 + 6x + 1

Though you are required to understand differentiating from first principles for the exam, questions such as this become quite straightforward once you know the trick. To differentiate all you have to remembe...
MJ
Answered by Myles J. • Maths tutor
3951 Views

Expand the following brackets: (2x + 1)(x + 3)

The FOIL technique (First, Outside, Inside, Last) is very useful when expanding out brackets. Using this method we have:2x * x = 2x 2 (First) 2x * 3 = 6x (Outside) 1 * x = x (Inside) 1 * 3 = 3 (Last)So overa...
BA
Answered by Ben A. • Maths tutor
4465 Views

Solve the following system of simultaneous equations: y=x^2 - 5x + 4 ; x+2y=19

Sub y=x^2 - 5x + 4 into x+2y=19x+2(x^2 -5x + 4) = 19x + 2x^2 -10x + 8 =192x^2 - 9x -11 = 0 (2x -11)(x+1) = 0x= 5.5x=-1
SR
Answered by Sulamaan R. • Maths tutor
5122 Views