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I am getting stuck on how to solve Simultaneous Equations, can you explain how to do this?

I always find with simultaneous equations that it is first important to remember what you are actually trying to do- to work out the values of x and y given what you know about them. So lets use this example...
CS
Answered by Chris S. • Maths tutor
5047 Views

If the area of a circle is 9pi cm^2, then what is the radius of this circle?

The equation of the area of a circle is A = pi*(r^2) Therefore seeing as we have got the area we must work backwards to be able to answer this question. First we shall start off with substituting into the eq...
TT
Answered by Tamara T. • Maths tutor
13495 Views

Expand and simplify: (2x+3)(x-8)

For this kind of question, the FOIL method can be used. You start by multiplying the FIRST aspects of both brackets, in this case giving 2x². Then you do the same with the OUTERS, the last elements in each b...
GC
Answered by Georgia C. • Maths tutor
17693 Views

Solve the Simultaneous equations '2x-3y=24' and '6x+2y=-5'

To solve you must make sure there are the same number of either x's or y's in both equations. We will call '2x-3y=24' equation 1, and '6x+2y=-5' equation 2. If you multiply equation 1 by 3 then you get '6x-9...
ES
Answered by Elena S. • Maths tutor
7870 Views

Factorise x^2-7x+12

First write down all the factor pairs of 12 (1,12) (-1,-12) (3,4) (-3,-4) (6,2) (-6,-2). From these factors, find a pair that, when added together, is equal to -7. In this case the correct pair would be -3 a...
HD
Answered by Harry D. • Maths tutor
10599 Views