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Solve algebraically the simultaneous equations 3x + 2y = 15 and 2x + 4y = 10

Firstly, we need to eliminate on of the terms of the equation, either the x or the y term, by combining the two equations into one equation. To do this we can add or subtract the two equations from each othe...
EB
Answered by Eleanor B. • Maths tutor
4914 Views

How do I know which rule of trigonometry to apply in a question?

There are four trigonometry rules which you need to know: Pythagoras, SohCahToa, the cosine rule and the sine rule. The first two only work on right angle triangles, and the second two apply to non-right ang...
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Answered by Seb P. • Maths tutor
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Find the values of X and Y from the simultaneous equations: 1) 2x + 5y = 33 2) x + 3y = 19

2x + 5y = 33 2) x + 3y = 19 multiply equation 2 by a factor of 2 giving you 2x + 6y = 38 Your two equation are now: 1) 2x + 5y = 33 3) 2x + 6y = 38 Subtract 3 from 1 to eliminate the x's Giving you Y = 5 Now...
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Answered by Chris C. • Maths tutor
3760 Views

What is the method to solve an equation of type : ax^2+bx+c = 0 ?

This kind of equation is called a quadratic or a polynomial of degree 2.The goal when faced with a quadratic is to solve it as fast as possible. We do this in two steps. First, we check if there is an easy w...
AV
Answered by Antoine V. • Maths tutor
5454 Views

Simplify fully (x^2 + 3x)/(4x + 12) ​

First, factorise both the top and the bottom expressions. What is the common factor for the top expression? (expect an answer of x). If you factorise out the x, what are you left with? (expect x(x+3))What is...
MP
Answered by Martha P. • Maths tutor
3802 Views