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2x+y=18, x-y=6; Solve the simultaneous equations

2x+y =182) x-y =6(x-y=6) multiply by +22x-2y = 121) 2x+y = 182) 2x-2y=12 -subtract equation 2 from equation 10x-y=6 -Therefore -y=6 so y= -6Put value for y into either of the equation in order to find value ...
SW
Answered by Saskia W. • Maths tutor
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Why does bread start to taste sweet after being chewed in the mouth for a long period of time?

[Hints given to student: (1) Bread contains starch, and (2) saliva mixes with your food when you are chewing]. ANSWER : Bread contains the carbohydrate called 'starch', a molecule consisting of a chain of gl...
RA
Answered by Raghav A. • Biology tutor
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Differentiate x^3 + 6x + 1

Though you are required to understand differentiating from first principles for the exam, questions such as this become quite straightforward once you know the trick. To differentiate all you have to remembe...
MJ
Answered by Myles J. • Maths tutor
3838 Views

Explain the teleological argument and Hume's criticisms of it.

The teleological argument concerns itself with the ideas of purpose and regularity to argue for the existence of God. The argument is a posteriori, as it derives its evidence from observation of the natural ...
OM
25553 Views

Who won the Cold War and why was this outcome significant to the progression of world history?

Break this question into two parts. Firstly, what was the result of the Cold War? Secondly, why was this result important? To answer the first question, ask yourself when the Cold War ended and why you think...
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Answered by Abby S. • History tutor
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