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The value of a car depreciates by 35% each year. At the end of 2007 it was £5460. Work out the value of the car at the end of 2006.

-This question wants us to work backwards.Let N be the value of the car in the year 2006. Find the multiplier . 1-0.35 = 0.65. Hence N * (0.65) = £5460. Rearrange for N. N = £8400
RG
Answered by Rithvik G. • Maths tutor
11334 Views

How do you factorise a quadratic equation where the coefficient of x^2 isn't 1?

For this, we need to use the formula ax 2 +bx+c. Multiply the coefficient of a from your equation with the value of c. This gives you a value from which you need to find 2 factors of this value which also ad...
RG
Answered by Rosie G. • Maths tutor
6994 Views

How do you factorise a quadratic equation where the coefficient of x² isn't 1?

Using the formula ax 2 +bx+c, multiply the value of coefficient a, from your equation, with the value of c. Next, try to think of two factors of the number you just calculated, which also add together to mak...
GR
Answered by Grace R. • Maths tutor
3733 Views

Solve the simultaneous equations. 2x + y = 18 x - y = 6

2x + y = 18x - y = 6. There are a few methods you can use to tackle simultaneous equations. The one I find the easiest is making one of the unknowns a subject and plugging it back into the other equation. In...
SU
Answered by Sofia U. • Maths tutor
4121 Views

What is completing the square and how do I do it?

Completing the square is a method of solving quadratic equations that can't be factorised. The end goal is to express the quadratic in the form:(x + a) 2 = -bWhich allows us to root both sides and find our s...
HJ
Answered by Henry J. • Maths tutor
4306 Views