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Write the number 0.0534 in standard form (1 mark)

5.34 x 10^-2

Answered by Christopher T. • Maths tutor

3400 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 fi...

Answered by Saskia W. • Maths tutor

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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 = 2x² (First)2...

Answered by Ben A. • Maths tutor

3891 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

Answered by Sulamaan R. • Maths tutor

4721 Views

Solve the quadratic equation, x^2 - 4x -5 = 0

Solve x²- 4x - 5 = 0
A very full explanation would be:
Start by listing the pairs of numbers that can be multiplied together to get 1 * -5 = -5 (i.e. the coefficient of the first ter...

Answered by Ryan H. • Maths tutor

5011 Views