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The quadratic formula is (-b±sqrt(b^2-4ac))/2a where a is the coefficient of the x^2 term, b is the coefficient of the x term and c is the number. So, in this case a=5, b=-9 and c=4. Substitute this into ...

There are two methods to solve this equation. 1) Rearrange equation 2 to get all the xs and zs on the left hand side (9x+5z=80). Multiply either equation to get an equal number of xs or zs in both equatio...

It's B. Chlorobutane

In explaining this answer, I'd test the students knowledge of what a homologous series is. And then we'd draw out the alternative answers and I'd ask the student to explain why...

William J Baumol’s theory of contestable markets (1982) holds that there are markets served by a small number of firms, which are nevertheless characterized by competitive equilibria, and therefore, desir...

It is important to approach your options tactically. Universities have very different selection criteria and it is key to apply to those that value your strengths; for instance some put emphasis on the nu...