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Maths
GCSE

You put £800 in a bank account, which earns you 3.5% compound interest per year. How much interest would you have earned after seven years?

We start with £800 in the bank. As we are earning compound interest, it means that each year we get 3.5% of the original £800, plus 3.5% of any interest that has already been earned...

Answered by Philippa M. Maths tutor
4195 Views

Solve the simultaneous equations (1) 2a - 5b = 11 (2) 3a + 2b = 7

(1)x2 4a - 10b = 22(2)x5 15a + 10b = 35(1) + (2) 19a = 57a = 3sub a = 3 into (1)2(3) - 5b = 116 - 5b = 11-5b = 55b = -5b = -1

Answered by Hannah C. Maths tutor
8496 Views

A picture is bought at a sale for £40. It is laster sold for £50. What is the percentage profit?

percentage profit = percentage increasepercentage increase = (difference/original) x 100                 = (50 - 40)/40) x100=25%

Answered by Hannah C. Maths tutor
4829 Views

Solve the simultaneous equations: 4x+3y=5 and x-y=3, to find the values of x and y.

First of all, we need to get the equations in a form so that either x or y can be eliminated.

In this case, I have a positive amount of y, and a negative amount of y, meaning that I can a...

Answered by Laura P. Maths tutor
10168 Views

Find the mid point of the line A B, where A is (8,-1) and B is (2,5).

To find the midpoint between two points, first we must find the mid point between the x coordiates and then the y coordinates.

The x coordiate of A is 8 and the x coordia...

Answered by Amy K. Maths tutor
6608 Views

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