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Write sqrt(75) in simplified surd form.

First you want to find a square number that is a factor of 75. In this case it is 25, as 25 x 3 = 75 . With this information you can expand the surd into:sqrt(25) x sqrt(3) As 5^2 = 25, this can become:5 x s...
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Answered by Kate G. • Maths tutor
7802 Views

Here are three expressions. b/a, a – b, and ab. When a = 2 and b = -6, which expression has the smallest value?

b/a = -6 / 2 = -3 ......... a - b = 2 - (-6) = 8 ............ ab = 2 x -6 = -12 ...............Therefore ab , -12, has the smallest value.
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Answered by Tara M. • Maths tutor
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Factorise x^2 +7x +10

First, you need to look at the x 2 term and the number 10 - find all the factors of these numbersThe number before x 2 is 1, and since 1 is a prime number, the only factor is 1. 1=1x1As for the number 10: 10...
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Answered by Sophie A. • Maths tutor
4652 Views

Why does a dominant allele mean a higher probability that offspring are affected by a disease?

To start with lets define an allele - these are different versions of the same gene. Genes are small sections of DNA which carry codes to tell your body what proteins to make. Each gene has two alleles - for...
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Answered by Maggie F. • Biology tutor
4282 Views

Why are there so many different forms of "the" in German?

All nouns in German have a 'case' and this means that a different form of the noun is used depending on what its role is in the sentence. For example, if it is the subject (the 'do-er' of the action) or the ...
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Answered by Alice H. • German tutor
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