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The value of a new car is £18000. The value of the car decreases by 25% in the first year, and 12% in each of the next 4 years. Work out the value of the car after 5 years.

In the 1st year the car loses 25% of its value, meaning it retains 75% of its value. The starting value (100%) was £18000, so multiplying this by the 75% retained - remembering to change this to decimal nota...
AM
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What's the key to solving simultaneous equations?

With simultaneous equations, a lot of the maths GCSE qualification, the best approach is to work things out step by step and write every step you take down on your exam paper. This does seem like its time co...
DI
Answered by David I. • Maths tutor
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Please describe the change in velocity of someone falling from a plane before they open their parachute

At first, when the parachutist is at 0ms-1 velocity (about to fall) there is only Weight acting downwards on the person, so the resultant force is down. F=ma, therefore the parachutist accelerates downwards....
PE
Answered by Pearl E. • Physics tutor
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How to find surface area and volume of a cone

Surface area:We know that the base of a cone is a circle, which has a surface area of πr 2 , where r is the radiusThe rest of the area will be π, r and l (the slanted length) multiplied togetherAnd then, we ...
FF
Answered by Fruzsina F. • Maths tutor
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The equation of the line L1 is y = 3x – 2 The equation of the line L2 is 3y – 9x + 5 = 0 Show that these two lines are parallel.

In this question, you are being asked to show L1 and L2 are parallel. The equations of two parallel lines will have the same gradient. This is the number in front of the x term in the equation, but to compar...
AW
Answered by Abigail W. • Maths tutor
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