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solve this simultaneous equation: 4x+ y = 12 , 2x+ y = 8

4x+ y = 12 , 2x+ y = 81) find the unknown (either x or y) that has the same coefficient. - In this example it is y2) Take away the equations from one another so you only have 1 unknown - 2x = 43) Divide by 2...
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Answered by Natasha S. • Maths tutor
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Name 3 things that can affect the activity of enzymes

1) Temperature : increasing the temperature increases the rate of reaction, however this can only happen to a certain point as beyond each enzyme's optimum temperature they get denatured (active site changes...
JC
Answered by Jessica C. • Biology tutor
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How do you solve inequalities when you have two inequality symbols in the expression, e.g. 4x - 6 < 14 < 3x + 2

So to tackle this question you have to imagine 4x + 6 &lt; 14 &lt; 3x - 2 as two separate inequalities.4x - 6 &lt; 14 and 14 &lt; 3x + 2 This still means the same thing but we have simplified it by looking a...
AP
Answered by Alice P. • Maths tutor
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Solve the simultaneous equations 3x - y = 5, x + 2y = -3

3x - y = 5 (A), x + 2y = -3 (B),6x - 2y = 10 (2A) ,7x + 2y +- 2y = 7 (2A) + (B),7x +2y - 2y = 7,7x = 7,x = 1,Sub x=1 -&gt; (A),3(1) - y = 5,3 - y = 5,-y = 2,y = -2 ,x = 1, x= -2
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Answered by Jessica C. • Maths tutor
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Describe the four stages of mitosis

There are four stages of mitosis: prophase, metaphase, anaphase and telophase. 1) Prophase Chromatin into chromosomes, the nuclear envelope break down, chromosomes attach to spindle fibres by their centromer...
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Answered by Jessica C. • Biology tutor
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