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Solve the simultaneous equations 5x+2y=13 and x-2y=5.

5x+2y=13 + x-2y = 5 6x =18Firstly you need to either add or subtract one equation from the other. The way to decide this is to either focus on the x's or the y's. The trick to solving these simultaneous equa...
AJ
Answered by Amy J. • Maths tutor
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Raya buys a van for £8500 plus VAT at 20%. Raya pays a deposit for the van. She then pays the rest of the cost in 12 equal payments of £531.25 each month. Find the ratio of the deposit Raya pays to the total of the 12 equal payments.

First find total cost with VAT. £8500 1.2 = £10200 To find deposit:£10200 - (12 £531.25) = £ 3825 To find ratio:3825 : (12*531.25)3825 : 63751 : (6375/3825)1 : 1.6 .
MP
Answered by Meg P. • Maths tutor
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What is global dimming and why does it occur?

Global dimming occurs due to light being reflected off the Earth's atmosphere and back into space.Light is reflected off the Earth's atmosphere due to the build up of Soot (C).Soot (C) is a product of incomp...
FR
Answered by Fazna R. • Chemistry tutor
5476 Views

There is a Wheel of Fortune. The Wheel is numbered 1-15. Each section is equal in size. If the spinner lands on your number you win a prize. Ali has the number 6. What is the probability that he wins a prize? Give answer as percentage to 2 d.p

So because the wheel is split into equal segments. We can assume that if Harry has a single number then there is a 1/15 chance of Harry's number being chosen. To find the percentage you need to type 1 divide...
AO
Answered by Ama O. • Maths tutor
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Describe the reflex arc in response to the hand touching a burning hot stove. Include the names and a description of location and function of all neurons involved. Bullet points are sufficient.

All bold text gives marking points Stimulus (burning hot stove) Receptor (thermoreceptor in skin) detects stimulus Sensory neurone - relays sensory information in the form of electrical impulses from recepto...
JV
Answered by Jonathan V. • Biology tutor
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