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Two simultaneous questions are given as 3x+2y = 9, and x-2y = -5. Find the values for x and y

Can be solved in 3 ways: Substitution - can rearrange equation 2 to for x = 2y-5. Then substitute this in to equation 1 to form, 3(2y-5)+2y = 9. Multiply out the brackets and rearrange to form 8y = 24, so y=...
AS
Answered by Aman S. • Maths tutor
5914 Views

Make y the subject of this formula: 9x = p(8 + y) + 5

When rearranging an equation, the most important thing to remember is that whatever you do to one side of the equation you must do to the other. In order to make y the subject you want to isolate it so that ...
TB
Answered by Tara B. • Maths tutor
4464 Views

What tips do you have for the writing portion of the exam?

This last question on any French GCSE exam is about putting into use all of the tricks you have learnt over the last two years. I recommend looking over the marking scheme before the exam to know exactly wha...
CC
Answered by Camille C. • French tutor
2453 Views

Solve the following integral: ∫ arcsin(x)/sqrt(1-x^2) dx

We will solve the integral by part. We know the formula for integration by parts: ∫ f(x)'g(x)dx=f(x)g(x)-∫f(x)g(x)'dx (1) . We know that: (arcsin (x))'=1/sqrt(1-x^2) . So we can write arcsin(x)/sqrt(1-x^2) d...
IC
11896 Views

Factorise x^2-25

=(x-5)(x+5)
UP
Answered by Urja P. • Maths tutor
3731 Views