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(2x+3)/(x-4) - (2x-8)/(2x+1) = 1 Solve for x

Multiply out the denominator, take care to multiply both sides of the equation: (2x+3)(2x+1) - (2x-8)(x-4) = (2x+1)(x-4) Expand the brackets, pay attention the the signs when multiplying, expecially the nega...
LM
Answered by Lucy M. • Maths tutor
3802 Views

How are different substances transported across the cell membrane?

There are several different ways substances can be transported: 1) simple diffusion, i.e. substances that tend to be lipid soluble/ non-polar and can pass easily across the phospholipid bilyar of cells. 2) f...
VS
Answered by Vinay S. • Biology tutor
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There are n sweets in a bag, 6 of which are red. The rest of the sweets are blue. Jen removes 1 sweet from the bag. Jen then takes another sweet from the bag. The probability that Hannah takes two red sweets is 1/3. Show that n²-n-90=0.

We know the total number of sweets is n, and that 6 are red. When Jen takes the first sweet, the probability of it being red is [number of red sweets] / [how many there are] = 6/n . For the second sweet, the...
AB
Answered by Amy B. • Maths tutor
5505 Views

How do I analyse Shakespeare’s language?

When analysing Shakespeare, don’t panic if you don’t understand every word; focus instead on the overall meaning of the text. Ask yourself: What is Shakespeare trying to achieve here? Has he written this pas...
KC
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What is the difference between independent measures design and repeated measures design?

An independent measures design consists of using different participants for each condition of the experiment. The advantage of this is that there are no order effects, which is when participants behave diffe...
CC
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