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Solve the following simultaneous equations. x^2 + 2y = 9, y = x + 3

x^2 + 2y = 9y = x + 3 x^2 + 2y = 9x^2 + 2(x+3) = 9x^2 + 2x + 6 = 9x^2 + 2x - 3 = 0(x + 3)(x - 1) = 0x= -3, x = 1 when x = -3y = x + 3y = (-3) + 3y = 0 when x = 1y = x + 3y = (1) + 3y = 4
JF
Answered by John F. • Maths tutor
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Describe the process of gene transcription?

Transcription is the process in which a gene's DNA sequence is copied to form a messenger RNA molecule. The DNA molecule unwinds due to the action of DNA helicase. RNA nucleotides complementary base pair wit...
JF
Answered by John F. • Biology tutor
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Prove that the square of an odd number is always one more than a multiple of 4

If we say n is any number, then we know 2n represents an even number - any number multiplied by 2 is always even. 2n+1 represents an odd number - adding 1 to an even number always gives an odd number (2n + 1...
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Answered by Rebecca R. • Maths tutor
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What would be the impact on the multipler effect given an increase in income tax?

The multipler effect is when an additional increase in aggregate demand can cause a greater final impact on national income (GDP) than the inital size of the injection, with the multipler being a coefficient...
DB
Answered by Daud B. • Economics tutor
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Comment est-que je peux parler dans une manière plus sophistiquée?

En utilisant des phrases idiomatiques on peut améliorer son niveau de la langue parce qu'elles sont plus complexes étant donné qu'elles ne traduisent pas littéralement. Donc, telles expressions démontrent un...
EB
Answered by ella b. • French tutor
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