If 30 marks equals 40% what is the full marks

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04-03-2018
Mathematics

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If 30 marks equals 40% what is the full marks

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Prove that (x^5)-(x^2)+2x +3=0 has at least one real root. Prove that x=cosx has at least one solution.

susanwiederspan susanwiederspan · Answer 1 · 2018-03-04T21:14:58+01:00

susanwiederspan susanwiederspan

04-03-2018

We can write that 40% of the full amount is 30 marks.

Using x for the full amount, we can say 0.4x=30.

To solve for x, we devide both sides by 0.4 (or equivalently, multiply by 2.5).

We get x = 75 marks.

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