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Use these 2 simultaneous equations to find x & y: 5y+21=9x and 6x+7y=45

Okay so first, to make the process more simple, I would suggest collecting all algebraic terms on the same side of the question as to get: 9x-5y=21 and 7y+6x=45 (as it already is). Next, looking at both equa...
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Answered by Maddy S. • Maths tutor
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What is algebra and why do we use it?

Algebra is a part of mathematics in which letters or symbols are used to represent either a known constant or an unknown value. Algebra is often used within formulae in which we can extrapolate an answer, an...
Answered by • Maths tutor
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Describe how an impulse travels across a synapse

The impulse arrives at the synapse. The neurone releases neurotransmitters into the synapse. The neurotransmitter diffuses across the synapse and binds to a receptor on the next neurone. This causes the next...
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Answered by Fay H. • Biology tutor
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Define the concept of 'Agentic state' as part of agency theory.

The Agentic state is a mindset which allows us to carry out orders from an authority figure, even if it causes us moral strain. In this state we do not feel responsible as we believe that we are acting on so...
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Answered by Maisie G. • Psychology tutor
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Find the values of x that satisfy the quadratic equation: x^2 + 14x + 40 = 0

We use factorisation of double brackets to re-express the equation in a more useful form. For this factorisation, we require two numbers that add to make 14 and also multiply to make 40. We notice that the n...
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Answered by William M. • Maths tutor
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