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factorise and hence solve x^2 + 10x +18 = -3

x = -3 , x= -7

BW
Answered by Billy W. Maths tutor
3652 Views

solve the following simultaneous equations 4x + 6y = 16 and x + 2y = 5

x = 1, y = 2

BW
Answered by Billy W. Maths tutor
4071 Views

Describe the process of DNA replication

DNA replicates by a semi-conservative method. When replication needs to occur, DNA helicase separates the two strands of DNA by breaking the hydrogen bonds between the strands. Each free strand now acts a...

PB
Answered by Parisha B. Biology tutor
4832 Views

How do you start to harmonise a 4-part Bach-style Chorale?

Initially, decide upon the key in which the piece is written. Key signature, accidentals and the beginning and end of the melody are good indicators. Secondly, decide whether there are any modulations. If...

JL
Answered by James L. Music tutor
3741 Views

How do you know if the second derivative of an equation is a maximum or a minimum?

If the second derivative of an equation is positive (d2y /dx2 > 0), we can see that this point on a curve is a minimum. This is because, where the first derivative finds the grad...

JG
Answered by Jessica G. Maths tutor
3404 Views

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