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Clare buys some shares for $50x. Later, she sells the shares for $(600 + 5x). She makes a profit of x% (a) Show that x^2 + 90x − 1200 = 0

Profit is (New price-Original price)/Original price . As a fraction it is percentage Profit/100. Equate (New price-Original price)/Old Profit to the fraction of Profit in %/100. Cross multiply and come up wi...
RH
Answered by Raj H. • Maths tutor
13223 Views

Analyse how a text uses language to create meanings and representations

F - form A - audience R- representations T - topic P - purpose Read through the whole text. Write a list of possible representations. Pick out quotes to back up each of these representations. Apply relevant ...
VM
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The nth term of a sequence is 8(2^n + 2^(6n-7)). a) Without a calculator, find the 2nd term of this sequence, b)​​​​​​​ Express the formula in the form 2^x + 2^y

To find a) just plug in the number two to all places where n appears. In this case 8(2^2 + 2^(6 * 2 - 7)) and then number crunch. 8(4+2^5) -> 8 * (4 + 32) -> 8 * 36= 288. To find part b, we must first ...
TP
Answered by Tom P. • Maths tutor
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Simplify fully: (7x^2 - 21x)/(x^2 + 2x - 15)

This one is quite complicated to answer typed up like this and i would definitley use a white board Show that 7x^2 - 21x can be come x(7x-21) which can in turn become 7x(x-3) Show that x^2 + 2x - 15 can beco...
DG
Answered by Dominic G. • Maths tutor
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What are the enzymes involved in the process of DNA replication?

DNA Helicase - unwinds and unzips the DNA double helix by breaking the hydrogen bonds DNA Gyrase - this helps to stabilise the single strands Single-Strand Binding Proteins - these proteins, though not exact...
DG
Answered by Dominic G. • Biology tutor
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