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Solve these equations simultaneously: (1) 5x - 10z = -45 and (2) 9x = -5z + 80

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 equations,...
MP
Answered by Matilda P. • Maths tutor
4371 Views

Which compound is a member of the same homologous series as 1-chloropropane? A. 1-chloropropene B. 1-chlorobutane C. 1-bromopropane D. 1,1-dichloropropane

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 each inco...
JP
Answered by Joe P. • Chemistry tutor
15278 Views

Explain why, in theory, a perfectly contestable market results in an efficient allocation of resources

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, desirabl...
RM
Answered by Rebecca M. • Economics tutor
20414 Views

Which Medical school should I apply to?

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 numbe...
MD
2318 Views

What is diffusion and what effects the rate at which it occurs?

Diffusion is the movement of particles from an area of high concentration to an area of low concentration (with the gradient). Once the concentration in each area is equal, the overall diffusion rate is 0. W...
LC
Answered by Lucie C. • Biology tutor
23315 Views