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Solve the simultaneous equations: 2x + y = 5 , x + 4y = -22

Showing each step of working is important.First, we need to rearrange one of the equations to solve for x or y.If we rearrange the first equation to solve for y in terms of x we get: y = 5 - 2x ( by subtract...
JF
Answered by Joel F. • Maths tutor
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What is diffusion?

Diffusion is the process by which a molecule moves from an area of high concentration to an area of low concentration, down a concentration gradient. Any gas or liquid can move by diffusion, and no energy is...
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Answered by Joel F. • Biology tutor
2950 Views

Describe the molecular structure of starch.

There are 2 types; amylose and amylopectin which are both made of alpha glucose and are tightly coiled. while amylopectin has branches and 2 bonds, 1-4 and 1-6 glycosidic bonds, amylose only has 1-4 glycosid...
Answered by • Biology tutor
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What should I write about my work experience in my personal statement for medicine?

The aim of the personal statement is to help the tutors at university get to know you as a person, and understand why that you want to study medicine. There are two important things that they are looking for...
JW
1671 Views

Schreiben Sie einen Brief an ihren/ihrer Deutsch Lehrer/Lehrerin, und erzählen Sie was Ihnen am Sprachunterricht gefallen hat und weshalb er so effizient war. (from past IB exam)

Although I will not be answering this question, I will point out important things to consider when posed with a question as such in the final exam. Firstly, it is essential to establish what format of text t...
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Answered by Medha A. • German tutor
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