Top answers

i) Make y the subject of the expression x = ((a-y)/b))^1/2 ii) Simplify fully (2x^2 − 8)/(4x^2 − 8x)

i) Square both sides of the expression to make x^2=(a-y)/b Multiply by b to remove the fraction from the equation and then rearrange to make y the subject. bx^2=a-y --> y=a-bx^2 ii) First factor out 2 fro...
OS
Answered by Oscar S. • Maths tutor
4794 Views

How do you balance chemical equations?

Example question: _H 2 O --> _O 2 + _H 2 First, work out how many of each element you have on each side. For example in this equation, Left: 2 hydrogen and 1 oxygen Right: 2 hydrogen and 2 oxygen We can t...
EW
Answered by Eve W. • Science tutor
3143 Views

Conjugate the verb and underline the correct option --> Aunque yo ………………………………. (saber) la verdad, no te lo/la podría contar

Aunque yo supiera la verdad, no te la podría contar. If we analyze the second clause in the sentence, we notice that the verb poder is in the conditional tense. This implies that the 'aunque yo' is to be tra...
OS
Answered by Oscar S. • Spanish tutor
3140 Views

Name the three components that make up a nucleotide

First of all a nucelotide is the monomer that makes up DNA. Millions of monomers are joined together to form the double helix of a DNA molecule. A nucleotide is made of a pentose sugar (in the case of DNA th...
AS
Answered by Amy S. • Biology tutor
17872 Views

Differentiate x^3 − 3x^2 − 9x. Hence find the x-coordinates of the stationary points on the curve y = x^3 − 3x^2 − 9x

To differentiate, we bring the power down and decrease the power by 1. So x 3 becomes 3x 2 , -3x 2 becomes -6x, and -9x (which can be written as -9x 1 ) becomes -9. So y' = 3x 2 - 6x - 9 This equation tells ...
TD
Answered by Tutor105800 D. • Maths tutor
11106 Views