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The area of a square is 49cm^2. The perimeter of this square is equal to the circumference of a circle. Calculate the radius of the circle to 1 decimal place.

To calculate the perimeter (the length of the outside edge) of a square, you must add up the length of each side. Here, we have been given the area of the square. The area of a square is calculated by squari...
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Answered by Faith B. • Maths tutor
19920 Views

If x = 3, what is the value of 2x^2

As we are told that the value of x is equal to 3, we are able to substitute this into our equation, so it becomes: 2(3)^2. We then use the rules of BIDMAS, so we must square the number 3 first (meaning we mu...
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Answered by Satveer R. • Biology tutor
50060 Views

How can I recognise the subjunctive?

It can be tricky to know how to recognise the subjunctive tense, particularly since it is rarely used in English! Rather than referring to the subjunctive as a "tense" it is better to understand it...
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Answered by Beatrice H. • Spanish tutor
2873 Views

Solve 6x^2-13x=5

To be able to solve a quadratic, you must make it equal to zero. So the first thing you have to do is take away 5 from both sides. You could take away 6x^2-13x from each side, but it is much easier to keep y...
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Answered by Eleanor C. • Maths tutor
9591 Views

Which food chain has the highest proportion of energy transfer. Grass -> cow -> human. Grass -> grasshopper -> rat -> snake. Rice -> human

Rice -> human. due to it having the fewest trofic levels (stages in the food chain) with each trofic level energy is lost through heat and movement as well as energy lost due to unabsorbtion in the digest...
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Answered by Ryan M. • Biology tutor
4597 Views