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James buys a new car for £1000. Every year the value of the car decreases by 3%. If James bought the car in 2017 what would the value of the car be in 2021?

First work out how many years have passed since the car was bought. 2017-2021 is 4 years. Write an expression for the cost of the car after n years. Cost = 1000 * 0.97 n . Write down an expression for the co...
WG
Answered by William G. • Maths tutor
3394 Views

How do you expand brackets?

Take the expression(x+2)(x+4). Expanding brackets essentially means multiplying them out to get a new expression. In this case, it will have the form x 2 +cx+d, where c and d are numbers to be determined. Th...
JA
Answered by Jan A. • Maths tutor
5434 Views

Expand and simplify: 4(2x − 3) − 2(x − 5)

4(2x - 3) - 2(x - 5) [Remember that a negative multiplied by a negative makes a positive] 8x - 12 - 2x +10 6x - 2 [Check: can I simplify further? 2(3x - 1)
RC
Answered by Rachel C. • Maths tutor
10869 Views

In a class there are 57 students. Of these 32 study Spanish, 40 study German and 12 students study neither. How many students study Spanish but not German?

The best approach to this problem is using a Venn Diagram. The first step to solving this problem is calculating the number of students who study Spanish or German or both. In the question we are given the i...
CD
Answered by Calum D. • Maths tutor
4902 Views

What's the best way to work out any percentage of a given number, e.g. 63% of 450?

The best way to approach this is to begin by working out what 1% of 450 would be: 450 is 100% of 450 So to work out what 1% of 450 is: 450 ÷ 100 = 4.5 Now we know that 1% of 450 is 4.5To work out 63% of 450,...
IW
Answered by Isobel W. • Maths tutor
4202 Views