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KS3

How many real solutions does x²=-36 have?

There are no real answers for this equation.This is because you would have to square root a negative number to solve the equation and that is a mathmatic impossibility.

HC
Answered by Harry C. Maths tutor
2095 Views

Describe the process of Prokaryotic cell replication by Binary Fission.

Firstly, the circular DNA and plasmids replicate - the plasmids replicate multiple times, but the main DNA loop only replicates once. Next the DNA moves to opposite poles as the cell gets bigger. Then the...

MG
Answered by Maisie G. Biology tutor
3999 Views

Solve the following algebraic equation: x^2 + 6x + 9 = 0

I would explain on the whiteboard how to factorise itleading them to having two brackets, (x + 3) and (x+3). Could also be written as (x+3)^2then teach them on whiteboard how to solve the equation(x+3)^2 ...

IJ
Answered by Isabella J. Maths tutor
1993 Views

Explain what is in one molecule of Sodium sulphide (Na2SO4)

The Na2 tells us there are 2 sodium atoms present, The S tells us there is one Sulphur atom presentThe O4 tells us there are four oxygen atoms presentTherefore, each molecule of Sodium Sulphide contains, ...

JM
Answered by Jamie M. Chemistry tutor
2276 Views

If a person weighs 400N and the total area of their feet is 120cm^2, what is the pressure they are exerting on the ground?

The formula for pressure is Pressure = Force / AreaIf the force is 400N and the area is 120 cm2, the pressure is equal to 400/120, which is 3.33 N/cm2

JM
Answered by Jamie M. Physics tutor
1846 Views

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