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Solve the simultaneous equations: 2x+y=18 and x-y=6

To solve these simultaneous equations there are two different methods that could be used. The first one to try in this case is to start with rearranging one of the equations to get a value of y by itself. Fo...
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Answered by Ella E. • Maths tutor
4388 Views

What is meant by a positive feedback loop, and could you give an example?

Feedback loops/systems/cycles can be either positive or negative, and it is important to understand the difference between the two. Crucially, in this case, 'positive' does not refer to something which is 'g...
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Answered by Tom H. • Geography tutor
7568 Views

How would changing reaction vessel volume and reaction vessel temperature affect the rate of a reaction?

Reaction vessel volume If the reaction vessel volume were to be increased, the concentration inside the vessel would decrease. Therefore the molecules would not be as likely to collide with each other, lower...
JL
Answered by Jakub L. • Chemistry tutor
19205 Views

Solve these simultaneous equations; 2y + x = 8, 4 + 4y = 8x

equation 1: 2y + x = 8 equation 2: 4 + 4y = 8xSolve by substitution ; simplify equation 1 2y + x = 8 x = 8 - 2y substitute into equation 2 4 + 4y = 8(8 - 2y)4 + 4y = 64 - 16y 4 + 20y = 64 20y = 60 y = 3 subs...
JH
Answered by Josephine H. • Maths tutor
4723 Views

Solve 3x + 10 = 10(2x-5)

Multiply out the right hand side so equation becomes 3x+10=20x-50Move x's to one side and numbers to other so 17x = 60x= 60/17
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Answered by Devin S. • Maths tutor
4208 Views