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Before WW2, African Americans lived largely in rural areas, many in the South. Literacy was very poor, and 9/10 black families lived under the poverty line. Most African-Americans worked in unskilled jobs...

a) Sub y= π/2 into equation, hence x coordinate is 4π^2 b) to find equation of the tangent, differentiate the equation using the chain rule (wrt y) and then substitute the coordinates of p into the differ...

There are several ways to factorise this quadratic expression, but the best way in my opinon is:

1. Take the constant in front of the x^2 and multiply it by the standalone constant (i.e. mul...

The English Civil War was in essence caused by the relationship between the country's King and its parliament, which had detoriorated over the previous decade. Charles has spent the 10 years running up to...

Lets first give the equations names.

4x+y=25 (A)

x-3y=16 (B)

We want to get the equations so that they have either the same number of x's or same number of y's. So let's multiply equa...