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a) A line passes through (0,9) and (3,12) write down the equation of this line . b) A line perpendicular to the line in part a passes through the point (3,14) write the equation of this line.)

a) The gradient of a line is given by the equation (change in y)/(change in x). Therefore to find the gradient of the line in part a we must do (12-9)/(3-0) = 1. Now we have the gradient we can use the formu...
RP
Answered by Rohil P. • Maths tutor
4574 Views

How many pages should I write in my exam essay?

The amount of pages you should write in your exam can never be given a definite answer. This is becuase it depends on many factors, such as your hand writing and the speed at which you can write. Instead of ...
KC
Answered by Katie C. • English tutor
4829 Views

Differentiate (x^0.5)ln(x) with respect to x.

First it's helpful to write f(x) = (x^0.5)ln(x)The product rule is useful here, this may be written in the form (u(x) v(x))' = u(x) v'(x) + u'(x) v(x).Here we will take u(x) = x^0.5 and v(x) = ln(x), meaning...
CC
Answered by Connor C. • Maths tutor
4668 Views

Describe how to test for and identify halide ions in a solution.

First acidify the solution using dilute nitric acid, then add silver nitrate. The silver ions should react with the halide ions to form a precipitate, with colour depending on which halide ion is present:Chl...
CC
Answered by Connor C. • Chemistry tutor
6067 Views

Find the range of a degree-2 polynomial function such as 2x^2 +1, or x^2 + 2x - 3.

There are 3 methods for finding the range of a polynomial fucntion. This is good news because if you arrive at the same answer using these methods you wil be more confident that it is the correct answer.The ...
DH
Answered by Douglas H. • Maths tutor
3998 Views