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There will be intersection when x^2 + 4x + 3 = kx + 2. Our goal is to find the values of k which would only give one solution to this quadratic equation, which would make the lines 'tangent' to each other...

KE = 0.5mv² [1] v = 3x10⁸ * 0.95 = 2.85x10⁸ [1] KE = 0.5 * 1.67x10^-27 * (2.85x10⁸)²  [1] KE = 6.782 x10^-11 J [1]

1. Homophonic texture is when the music sounds 'as one', such as block chords, where all instruments change notes at the same time.

2. Polyphonic means 'many sounds'. The instruments...

2x²(x² + 2 - 16x)

First, convert the units so you can compare more easily. 

0.72m = 72cm = 720mm

So 1 shelf is 720mm and 1 textbook is 30mm wide. 

To find the maximum number of books that can be stored...