Top answers

x^2 +y^2 =25, y – 3x = 13 - Simultaneous Equations (June 2017)

x = -4.8x = -3
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Answered by Angelo U. • Maths tutor
3269 Views

4x+2y=22, (y/2)+(x/4)=2.5

x=4,y=3
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Answered by Ieuan L. • Maths tutor
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2 chocolates weight 250g, there are 220 calories in 100g of chocolate. How many calories are in one chocolate?

275 Calories
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Answered by Ieuan L. • Maths tutor
4939 Views

Solve these simultaneous equations: 3x-5=-4y and 2xy=-4

First start with 2xy=-4, rearrange to find in terms of x, x=-2/y. Substitute this into the other equation (3x-5=-4y), producing -6/y -5 =-4y.Times every term by -y resulting in 6+5y=4y 2 .Rearrange to 4y 2 -...
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Answered by Amelia S. • Maths tutor
3849 Views

How do you differentiate using the chain rule?

At first the chain rule can seem quite daunting and convoluted but with a few examples over the course of this lesson, it will seem simpler and more intuitive. The chain rule is used where the equation that ...
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Answered by Alex K. • Maths tutor
3605 Views