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What are simultaneous equations and how do I solve them?

E.g you have 2 equations and have to set them equal to each other. 2x + 3y = 6 -3x + y = 2 multiply first equation by 3, second by 2 to get 6 x + 9y = 18 -6 x + 2y = 4 11 y = 22 y = 2 -6x + 2(2) = 4 -6x = 0 ...
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Answered by Susanne K. • Maths tutor
5498 Views

In integration, what does the +c mean and why does it disappear if you have limits?

When you differentiate, the constant disappears, because it is not dependent of the variable. So when you integrate, you have to add the constant again. However, you can't know the vaulue of c without being ...
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Answered by Susanne K. • Maths tutor
11059 Views

What if my equation doesn't factorise?

For all quadratic equations, you can use the quadratic formula . Given an equation of the form ax 2 +bx+c , you can plug those values into this formula: x 1 , x 2 = (-b +/- sqrt(b 2 - 4ac)) / 2a Note: the te...
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Answered by Hayden M. • Maths tutor
4886 Views

Why does the government have to take the multiplier effect into account?

The multiplier effect occurs within the circular flow of money, more precisely when people earn income and spend a proportion of what they have earned. When the government invests in infrastructure (for exam...
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Answered by Sithara T. • Economics tutor
3493 Views

Please explain (in German) what you did last summer. Bitte erklären Sie was Sie letzten Sommer gemacht haben.

Answers may vary!! Ein Beispiel: Im Juli habe ich eine gute Freundin in Frankfurt besucht. Wir kennen uns schon seit ein paar Jahren und haben immer viel Spaß zusammen. Wir waren im Schwimmbad, auf Straßenfe...
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Answered by Sithara T. • German tutor
10466 Views