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Total perimeter - 72cm. Perimeter - (3+4+5)x -> 72=12x therefore x=6. The area of the triangle is 0.5(3x4x) (because 5x is the longest side) therefore the answer is 0.5(1824) = 216cm^2

This is an example of knowledge recall question with need for further explanation. It is therefore important to be able to explain yourself concisely and in the manner that the examiners expect to gain th...

Divide through by 9 giving:(x+3)² = 4/9 Square root both sides remembering a square root is plus or minus the answer x+3 = +/-sqrt(4/9) sqrt(4/9)=2/3for the first solution x+3 = 2/3 or x = -7/3...

Transcription is the first stage of protein synthesis. It involved the formation of primary mRNA. Transcription begins with a section of DNA within the nucleus unwinding using enzyme DNA helicase. This se...

To expand this, we must multiply each term in both brackets separately and then add all of these terms together. First, multiply the first term in each of the brackets: 3a x a = 3a^2. Next multiply the fi...