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How do you solve simultaneous equtions?

Say you had two equtions to solve simultaneously. Example 1: x + 5y = -7; 2x - 2y = 10 Multiply one of the equtions so that one of the variables has the same coefficient. In this example, I would multiple th...
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How do you solve simultaneous equations and why do you do it?

Solving simultaneous equations allows you to identify at which point on a graph two lines intersect. For example, take the straight line -x + y = 2 and parabolic curve y= x 2 Firstly, let's re-arrange the st...
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Answered by Peter H. • Maths tutor
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Sketch the line y=x^2-4x+3. Be sure to clearly show all the points where the line crosses the coordinate axis and the stationary points

From the equation we can see the the line in a positive quadratic graph. In order to find the points where the line crosses the x axis we must let y=0 and solve for x. We can then use either inspection, comp...
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Answered by Matthew S. • Maths tutor
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What orbital hybridisation?

Orbital hybridisation is a model used to explain covalent bonding in molecules. It involves the merging of orbitals that are on the same energy level to form new hybrid orbitals. Orbital hybridisation most c...
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Answered by Lukas R. • Chemistry tutor
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How do I calculate the relative formula mass of FeSO4 and the number of moles, when the formula mass of O=16, S=32, Fe=56 and the mass of FeSO4= 380g

The formula mass (Mr) of FeSO4 is the total mass of all the individual elemenets added together. So the Mr of FeSO4 = (1 x Fe) + (1 x S) + (4 x O) = 56 + 32 + 4x16 = 152 To calculate moles, the equation for ...
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Answered by Henry M. • Chemistry tutor
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