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Solve x^2 - 5x - 14 = 0

This is an example of a quadratic equation which we can solve on of two ways as it takes the form ax^2 + bx - c = 0a = 1, b = -5, c = -14 (1) Factorisation which we can do ourselves OR (2) Use the quadratic ...
JB
Answered by Jessica B. • Maths tutor
9778 Views

Solve algebraically: 1) 6a + b = 16, 2) 5a - 2b = 19

Firstly multiply the first equation by 2 resulting in the equation 12a + 2b = 32. Following this, add the first equation to the second equation, this will result in the 2b cancelling out with just 17a = 51. ...
AS
Answered by Andrew S. • Maths tutor
3565 Views

How to solve a simultaneous equation?

In simultaneous equations, at this level, you are often given two equations both containing an x and a y. For example:Equation1: y + 2x = 3Equation2: 4y + 2x = 8.The first step in approaching this is to try ...
SB
Answered by Sophie B. • Maths tutor
4289 Views

The exchange rate between dollars and euros(€) is €1 = $1.158 . (a) Felicity changes €4900 into dollars. Work out how many dollars she receives.

4900*1.158=5674.2/1Felicity receives $5670 (to 3sf)
AT
Answered by Alejandra T. • Maths tutor
5623 Views

Naoby invests £6000 for 5 years. The investment gets compound interest of x% per annum. At the end of 5 years the investment is worth £8029.35 Work out the value of x.

The answer to the question can take a backwards approach. i.e. in order for you to make £8029.35 in 5 years from £6000, what does the yearly interest need to be.Since the interest is compounded, the yearly i...
AL
Answered by Arlind L. • Maths tutor
21002 Views