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If we know that y is directly proportional to x and that when x=1, y=3, then what is the value of x when y=4?

The fact that y is directly proportional to x gives us that y=kx, where k is some constant.Firstly, we need to find the value of this constant, using the pair of values we are given in the question. We su...

Answered by Joshua E. • Maths tutor

3316 Views

Integrate the function f(x) = x ln (x) over the interval [1,e].

This problem can be solved using integration by parts (IBP), although using IBP multiple times:BASIC IBP METHOD: given an expression integral(u dv) where ...

Answered by James H. • Further Mathematics tutor

4082 Views

Explain how cystic fibrosis affects digestion, gas exchange and reproduction.

Background information I would give to the student: This question is a perfect example which shows that if you really understand the topic, it becomes easier to remember the facts for the questions relati...

Answered by Shaswath G. • Biology tutor

9195 Views

How does synaptic transmission work?

Synaptic transmission occurs at a synapse between a presynaptic neuron and a postsynaptic neuron, allowing them to communicate with each other. Once the electrical impulse, also known as an action potenti...

Answered by Amelia B. • Psychology tutor

2540 Views

How do I remember the difference between an independent variable and a dependent variable?

An independent variable refers to what is changed during an experiment, whereas a dependent variable refers to what is measured. In an experiment, we manipulate the independent variable to see if it has a...

Answered by Amelia B. • Psychology tutor

32416 Views