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We have a parallelogram with sides of 8cm and 5cm and an angle of 140 degrees, calculate the length of two diagonals

We would first like to work out the size of all the angles which have not been give, as one angle is 140 degrees we know the angle opposite to it is also 140 degrees due to the symetry of the shape. The two ...
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Answered by Thomas O. • Maths tutor
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If one shop has melons for sale on a buy one get one free offer at £2 a melon with each melon weighing 2kg, and a second shop offering melons at 30p per kilogram. Which shop is the best value for money?

Firstly you would analyse the cost of the melons in the first shop per kg. So you could buy 2 melons for £2 because they're buy one get one free and each weighs 2kg so therefore you're getting 4kg of melon f...
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Answered by Faye B. • Maths tutor
3569 Views

Is there a sure-fire way of knowing if a noun is masculine or feminine?

There is no such thing as a foolproof way of determining the gender of a noun. However, there are a few rules which are worth learning and which will help you in this way, especially if you are a list learne...
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Answered by Samy C. • French tutor
2556 Views

Explain why fluorine is reactive

Fluorine is a halogen, these group 7 elements are reactive because they require just 1 additional electron to achieve a noble configuration. Fluorine is the smallest halogen, and so its outer electrons are c...
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Answered by George L. • Chemistry tutor
6987 Views

A curve has equation y= e^x -5x, Find the coordinates of the stationary point and show it is a minimum point

differentiating e x gives e x (need to know this), differentiating -5x gives -5 (step the power of the x down by 1 and multiply the original power with the coefficient, power of the x was 1 so becomes 0, x 0...
JC
Answered by James C. • Maths tutor
9149 Views