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What is 125^(-2/3)?

Firstly, the negative power sign flips the number the 1/125.The 1/3 part of the power means find the cubic (3rd) root. 1/5Finally the 2 of the power means square the number. 1/25 is therefore the final answe...
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Answered by Emily R. • Maths tutor
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What is the gradient of the curve y = 2x^3 at the point (2,2)?

Firstky differentiate to gain an equation for the gradient.Differentiating gives:dy/dx = 6x 2 Insert x = 2 into the above equation to find the gradient at that particular point of the curve.When x = 2, dy/dx...
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Answered by Emily R. • Maths tutor
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Show that the curve y =f(x) has exactly two turning points, where f(x)= x^3 - 3x^2 - 24x - 28

This question is about turning points of a curve, these occur when the gradient of a line is zero. In its current form, the equation of the curve tells us nothing about the gradient of the curve; it must be ...
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Answered by Joshua A. • Maths tutor
5742 Views

Provide one reason why a business may decide to create a sales forecast.

One reason a business may decide to create a sales forecast is the fact that it can help a bank decide whether it should lend money to a business. Many banks and lenders like to see evidence or at least an e...
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2005 Views

Issy goes to buy some fruit. She has been told by one friend that 2 apples and 3 bananas costs £3.80. She has been told by another friend that 5 apples and a banana costs £3.65. what are the individual costs of an apple and a banana?

To solve this we form two simultaneous equations. To make things easier lets denote apples as A and bananas as B. So this means we can write the above information in two equations like so: EQ1) 2A + 3B = 380...
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Answered by Kieren H. • Maths tutor
5133 Views