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Solve the following equations showing your method clearly. 3(2x + 9) − 7x = 4(x + 3)

3(2x + 9) − 7x = 4(x + 3)so 6x + 27 -7x = 4x + 12so 27 - 12 = 5xso 15 = 5xso x=5taken from The Haberdashers' Aske's Boys’ SchoolElstree, Herts 13+ Entrance Examination 2016
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Answered by Mehdi A. • Maths tutor
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How is our blood sugar regulated?

This is an important area of metabolic biology to understand. In non-diabetics, your blood sugar levels should be between 3.9 and 7.1 mmol/L (the unit shows that this is a concentration as it is how many mmo...
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Answered by Tutor133848 D. • Maths tutor
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Factorise fully the following: x^2 + 7x + 10.

Think S ir P aul M cCartney. ( SPM ) The S symbolises the square in the first section, the P means think of two numbers which plus to make 7 and the M means think of two numbers which multiply to make 10. If...
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Answered by Keighley H. • Maths tutor
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4, 7, 9, 10, 10 mean, median, mode, range

mean: add 4,7,9,10 and 10.This gives us 40divide 40 by 5, as we have 5 numbers.40/5= 8therefore mean =8 median... if we put all the numbers in an order.. middle number- 9 mode- MOde- MOst common- 10 as it ap...
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Answered by Sagana S. • Maths tutor
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Find 16% of £435

16% of £435 is equal to 10% of £435 + 6% of £435. 10% of £435 = 435 = £43.56% of £435 is 6 x 1% of £4351% of £435 = 435/100 = £4.35£4.35 x 6 = £26.1 16% of £435 = £43.5 + £4.35 = £47.85
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Answered by Minnie A. • Maths tutor
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