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Solve the following simultaneous equations: x^2 + y^2 = 5, y - 3x = 1.

Begin by rearranging equation 2 so that it is in the form y = ... Substitute this into equation 1 Expand the brackets and simplify the equation so that it is in the form Ax^2 + Bx + C = 0 Factorise this quad...
DO
Answered by Daniel O. • Maths tutor
3726 Views

How do I break down an essay question to make sure I approach in the best way?

The very first thing to do is to read the question twice. Highlight the key words. IB History essay questions can be very short and very broad, or the question can be immensely detailed; either way, it's imp...
JS
Answered by Josephine S. • History tutor
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Find the value of cot(π/3)

Pi radians is equal to 180 degrees . Radians are a unit of measurement for angles, just like degrees are, and pi is just the number of radians that makes up that angle. 180 divided by 3 is 60 so we get cot(6...
SD
Answered by Stefan D. • Maths tutor
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Explain the basics of projectile motion

If the projectile is released at an angle, it will have 2 components: 1. horizontal component of motion and 2. vertical component Horizontally, the projectile is assumed to travel at a constant speed (ie 0 a...
AQ
Answered by Aadam Q. • Maths tutor
6624 Views

Why are transition metal ions in water coloured, but sodium in water is not?

The colour of light is determined by its wavelength. White light is made up of electromagnetic radiation (photons) that spans the range 400nm - 700nm, the visible part of the E.M. spectrum. When white light ...
JH
Answered by Jack H. • Chemistry tutor
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