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Show that n^2 -n - 90 = 0

This is the full question:

There are n sweets in a bag. 6 sweets are orange. The rest of the sweets are yellow. Hannah takes a sweet out of the bag at random. She eats the sweet and th...

DN
Answered by Dylan N. Maths tutor
14548 Views

A car is travelling at 10m/s when it brakes and decelerates at 2ms^-2 to a stop. How long does the car take to stop?

This is a question testing the knowledge of the equations of constant acceleration (Suvat equations)First convert the question into a standard form. For example by writing out the variables as follows s (...

KM
Answered by Kirill M. Physics tutor
7910 Views

Integrate cos(4x)sin(x)

The easiest way of approaching this question is to use De Moivre's formula: e^(inx) = cos(nx) + isin(nx) from which it is simple to show that cos(nx) = (e^(inx) + e^(-inx)) / 2 and sin(nx) = (e^(inx))- e^...

KM
13667 Views

What are the differences between mitosis and meiosis?

Mitosis and meiosis refer to the way cells reproduce. 
Mitosis sees the cell divide in two, forming two genetically identical diploid cells. The reproduction of cells means mitosis is used by the bod...

CW
Answered by Chris W. Biology tutor
22551 Views

What is the difference between left and right wing politics?

The terms left and right wing refer to the political spectrum, usually expressed in terms of a line with the far left at one end, the far right at the other and the centre in the middle.

In Br...

CW
Answered by Chris W. Politics tutor
318214 Views

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