Top answers

Maths
GCSE

Square ABCD has length (x+3)cm and area 10cm^2. Show x^2 + 6x = 1

First sketch square ABCD. Split length into 3cm and then xcm for side AB and the same for side AD. Split the area of this square into 4 segments (a, b, c and d) such that a is a 3cm by 3cm square, b and c...

MM
Answered by Meghna M. Maths tutor
4174 Views

Henry invest £8000 in youtube at a compound interest rate of 2% per year. He wants to earn more than £500 interest. Work out the least time, in whole years, that this would take?

Each year his money will increase by 2%, meaning he will get 102% of his money from the previous year. This can be written as 1.02. After n years, he will make 8000 x 1.02 n. Calculate this for...

GL
Answered by Gillian L. Maths tutor
3308 Views

When should you use the sine rule and when should you use the cosine rule?

The sine rule can be used when we either know:a) the length of two sides A and B and an angle that is not the corner where A and B meetb) two angles and the length of one side
The cosine rule can be ...

JB
Answered by Joseph B. Maths tutor
2939 Views

expand y=(x+1)(x+2) and find what are the coordinates for x intercepts?

use the smile technique

SH
Answered by Sen H. Maths tutor
2366 Views

Simplify 4^2 x 2^4

42= 22x2=2424x24= 28 Explanation: In order to simplify powers you need to get the same base number. In order to ge...

JN
Answered by Jack N. Maths tutor
4826 Views

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