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Solve the simultaneous equations: 2x + 3y = 28 and x + y = 11

As the number of equations is the same as the number of unknowns, there is exactly one solution!We start by labelling the two equations:2x + 3y = 28 (1)x + y = 11 (2)There is more than one way to approach th...
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Answered by Harry H. • Maths tutor
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The normal price of a television is £1200. It is reduced to £970. Work out the percentage reduction. Give your answer to 1 decimal place.

First we calculate the difference between the original price and the new price. This is £1200 - £970 = £230. We now divide this difference by the original price, and multiply it by 100 to find the percentage...
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Answered by Harry H. • Maths tutor
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How can you find the integral of x^-1

The traditional rule for integration of a variable raised to a power is to raise the power by 1 and divide the answer by that new exponent. However, this rule leads to an answer of x^0 = 1, which can't be ri...
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Answered by Angus L. • Maths tutor
80420 Views

How fast are geostationary satellites moving?

From a Newtonian perspective, the equation for the speed of a satellite in circular orbit around the Earth at a radius r can be derived by equating centripetal acceleration to the acceleration due to gravity...
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Answered by Angus L. • Physics tutor
4343 Views

How does the Spanish GCSE work?

Spanish GCSE is set up with 4 sections. The listening exam, Reading exam, Oral exam and finally the Written exam.
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