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If a rectangle has length (x-4), width (x-5) and area 12 then what is the value of x?

length x width = area (as rectangle) (x-4)(x-5)=12 x 2 -9x+20=12 x 2 -9x+8=0 (x-8)(x-1)=0 x=8 or x=1 <---- x can't be 1 as we would get negative length and width x=8
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Answered by Simon M. • Maths tutor
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How should I write a grade 7 essay?

The most stressful parts of the IB exams (especially HL) are Papers 2 and (if HL) 3. Seeing as how you will only have about 30-40 minutes to write each essay, your 5 minutes of preparation time at the beginn...
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Answered by Matilde M. • History tutor
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What are the 2 types of enzyme inhibition and how do they work?

The 2 types are: Competitive and Non-competitive. Competitive inhibitors work by mimicking the shape of the substrate, they are specific to the shape of the active site of the enzyme and will take the place ...
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Answered by Soham C. • Biology tutor
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Please explain how polarisation of waves occurs?

Electromagnetic waves can be imagined by a sinusoidal wave moving up and down, with this movement perpendicular to the direction that they are travelling in. Imagine a sea wave, it moves up and down but also...
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Answered by Tom M. • Physics tutor
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Give 2 advantages and disadvantages of carbon fibre.

Advantages:Light weightStrong in tensionCan be coloured or imprinted on easilyCan be moulded to many shapesDisadvantes:Poor strength in some directionsWill rip and shatter when brokenExpensiveJoining points ...
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