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Simultaneous equation: (x-3y)=9,(2x+3y)=0

Using one of the equations we express either x in the form of y, or y in the form of x. We then put this expression of x/y into the other equation. This allows us to calculate the numerical values of both...

Answered by Kerushan T. • Maths tutor

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Describe what happens to sodium and chlorine in a reaction to make Sodium cholride, you may use diagrams to help you.

As Sodium is a metal and Chlorine is a non-metal they will undergo an ionic reaction in which Sodium will lose an electron and donate it to the Chlorine atom which will gain an electron. This will create ...

Answered by Gurpreet S. • Chemistry tutor

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y = 4(x^3) + 7x ... Find dy/dx

This is a simple differentiation question. To start, you need to know the general method of differentiation. This is:
if y = Axb then dy/dx = (A*b)x

Answered by Emilio E. • Maths tutor

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To what extent might a government implement an expansionary fiscal policy?

An expansionary fiscal policy is where a government decides to decrease taxes and increase public spending. An expansionary fiscal policy will usually take place when a government is not in a relatively l...

Answered by Joseph V. • Economics tutor

1635 Views