Algebra Homework Help : Formulae & Algebraic Relations

Express each of the following statements as a formula.
Type the formula in the input box. Leave no spaces when typing the answer.
Since there are multiple ways of writing an answer, it is possible the computer may mark a correct answer wrong.
So, please always check the answer and explanation.
SEVERAL OF THE FORMULAE BELOW ARE WELL-KNOWN AND WORTH REMEMBERING.

Formats

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1.
Pressure (P) is the force (F) divided by the area (A).

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Hint

2.
Perimeter (P) of a square is four times the length of a side (a).

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3.
The sum of the parallel sides (a and b) of a trapezium is twice the area (A) divided by the distance (d) between the parallel sides.

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4.
Profit (P) is the difference between selling price (S) and cost price (C).

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5.
The square of the hypotenuse (c) in a right-angled triangle equals the sum of the squares of the lengths of the other two sides (a and b).

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6.
Volume (V) of a cube equals the cube of the length of an edge (a).

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7.
Circumference (C) of a circle is (22/7) times the diameter (d).

Hint

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