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In a sale, the original price of a bag was reduced by 1/5. The sale price of the bag is £29.40. Work out the original price.

£29.40 represents 4/5 of xThus to find x, we must multiply 29.40 by 5/4:
29.40/4 = 7.35 (this is 1/5) 7.35 x 5 = 36.75 (this is 5/5, the original price)
Original price = £36.75

RW
Answered by Robert W. Maths tutor
3770 Views

Show that (1 - cos(2x)) / (1 + cos(2x)) = sec^2(x) - 1

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Answered by Louis G. Maths tutor
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Integrate 5(x + 2)/(x + 1)(x + 6) with respect to x

This term cannot be integrated in the form that it is in. We will have to do some algebraic manipulation to rewrite it. The term can be split into partial fractions because the denominator of the term has...

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Answered by Lata P. Maths tutor
3167 Views

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RD
42837 Views

Why does our heart rate increase when we run compared to when we are sitting?

Running demands a lot of energy in our leg muscles in order for them to contract and relax. Energy is released in the process of respiration which breaks down glucose into ATP. The equation for respiratio...

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Answered by Ayesha M. Biology tutor
3194 Views

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