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Solve these simultaneous equations: 2x + 5y = 37 and y = 11 - 2x

Simultaneous equation questions look very intimidating because not only are there 2 equations to solve but there is 2 variables in each! To start with, we're going to make the equations look less confusing b...
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Answered by Bethany R. • Maths tutor
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Find the roots of x^2+5x+4=0

(x+4)(x+1)=0 x=-1 x=-4
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Answered by Christian D. • Maths tutor
3817 Views

What is the difference between binary form and rounded binary form?

Binary form and rounded binary form are mostly the same in that they both have two related themes, one in each section, A and B, modulate to the dominant at the end of the A section, and back to the tonic at...
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Answered by Helena M. • Music tutor
22081 Views

What is an enzyme?

An enzyme is a protein which acts as a biological catalyst, to speed up reactions. It has an active site which is a very specific shape to allow it to bond to a particular reagent and catalyse a specific bio...
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Answered by Rachel H. • Biology tutor
4437 Views

Explain, in terms of pressure, how straws draw water into your mouth.

Atmospheric pressure is an expression for the force exerted on a surface (in this case the water surface) per unit area caused by air particle collisions on the surface. In a cup of water, there is a uniform...
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Answered by Benjamin S. • Physics tutor
14614 Views