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Find the inverse of a 2x2 matrix

Consider the 2x2 matrix M , consisting of elements a , b , c and d . To find its inverse one must first find the determinant of M . This is achieved by calculating the result of the expression ad - bc . The ...
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Answered by Giovanni D. • Maths tutor
5687 Views

Explain why a demerit good is overconsumed, if left to market forces.

A demerit good is a good which has a negative impact on its consumer and others in society. An example of this is alcohol, which can cause health problems for people who drink it, but also leads to external ...
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Answered by Henry H. • Economics tutor
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Find the stationary point of the graph of y = 2x + 5 + 27x^(-2)

y = 2x + 5 + 27x -2 To find a stationary point, find the gradient function by differentiating with respect to x:y' = 2 -54x -3 To find a stationary point, let the gradient function equal zero:2- 54x -3 = 02 ...
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Answered by Henry H. • Maths tutor
4133 Views

Tu primo español te ha preguntado sobre tus intereses. Escríbele sobre las actividades que te gusta hacer in tu tiempo libre. Menciona: (1) deporte (2) comida (3) familia (4) música (16 marks)

(1) Translate the question: Your Spanish cousin has asked you about your interests. Write to him about the activities that you like to do in your spare time. Mention: (1) food (2) sport (3) family (4) music ...
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Answered by Ellen H. • Spanish tutor
3232 Views

Find an expression for the escape velocity of a test object.

Escape velocity is the velocity required to just escape the gravitational pull of a body. The gravitational force of a body is given by Newtons Law: F = GMm / r 2 (where G is the gravitational constant, M is...
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Answered by Ciara N. • Physics tutor
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