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Expand and simplify the following equation: 3(2a+2) + 4(b+4)

This problem is best split into two parts either side of the '+' sign seen as they are independent of each other, so the first part: 3(2a+2), as the 3 is outside of the bracket we have to multiply everything...
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Answered by Joseph I. • Maths tutor
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What is ATP and what makes it a good source of energy in biological processes?

ATP (Adenosine triphosphate) is a nucleotide derivative which is used to store energy to power most of the reactions in a cell. Reminder: Nucleotides are the five bases which make up DNA and RNA - Adenine, C...
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Answered by Anna W. • Biology tutor
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What is a reflex arc?

The three different types, sensory, relay and motor neurons can all be used in a reflex arc; a relay neuron is not always necessary but often is included. It is easiest to remember them in that order as that...
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Answered by Bella B. • Biology tutor
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List the first 4 halogens as they appear in the periodic table as they appear. What does your answer suggest about their relative reactivity?

Fluorine, Chlorine, Bromine, IodineIf you write the electronic structure to start, F = 2,7, Cl = 2, 8, 7, Br = 2, 8, 8, 7, I = 2, 8, 8, 8, 7. This shows that they all have 7 outer electrons so we can tell th...
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Answered by Joseph I. • Chemistry tutor
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Discuss the political effects of automation

First give time to question the question. Look for key words that you can break down; in this example automation is a very broad concept and could use defining, and 'political' effects begs the question of s...
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