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Solve the equation (x+2)/(x-3)=(x-6)/(x+1) for x.

We need to multiply both sides by the denominator (the bottom of the fraction) in both fractions so we get:(x+2)(x-3)(x+1)/(x-3)=(x-6)(x-3)(x+1)/(x+1)Now, we can see that we can cancel each fraction to get t...
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Answered by Tom H. • Maths tutor
3398 Views

What is the difference between mRNA and pre-mRNA in a eukaryotic cell?

The major difference between pre-mRNA and mRNA is that pre-mRNA is the immediate product of transcription which is comprised of both exons (coding sequences) and introns (non-coding sequences). After transcr...
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Answered by Matt Y. • Biology tutor
45436 Views

Consider the infinite series S=Σ(from n=0 to infinite) u(down n) where u(down n)=lim (from n π to (n+1) π) ((sin t)/t) dt. Explain why the series is alternating.

For the first part of the question we need to try and understand what is actually happening – we have the sum of an integral – where we are summing a sequence of definite integrals. So when n = 0 we have the...
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Answered by Stuart D. • Maths tutor
6491 Views

Find an equation of the curve with parametric equations x=3sin(A) and y=4cos(A), in the form bx^2+cy^2=d.

x 2 =9sin 2 (A) and y 2 =16cos 2 (A)Since sin 2 (A)+cos 2 (A)=116x 2 +9y 2 =16 x 916x 2 +9y 2 =144
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Answered by Pranav V. • Maths tutor
4106 Views

Consider the role of social class in Agatha Christie's 'Death on the Nile'.

Here is an essay template for a GCSE, A-Level or undergraduate essay. For the GCSE level, we will follow P.E.E. (point, evidence, explanation) structure, for the A-Level, we will add ‘contextual’ detail to t...
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Answered by Anna C. • English tutor
4237 Views