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Given that y = -16x2​​​​​​​ + 160x - 256, find the value of x giving the maximum value of y, and hence give this maximum value of y.

y = -16x 2 + 160x - 256 x = 5 y = 144
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Answered by Matthew C. • Maths tutor
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Write down the next two terms in the sequence: 14, 14.75, 15.5, 16.25, ...

17 17.75
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Answered by Matthew C. • Maths tutor
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Write down the next two terms in the sequence: 14, 17, 20, 23, ...

26 29
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Answered by Matthew C. • Maths tutor
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Simplify: x + xy + y + yx + x

x + xy + y + yx + x = 2x + y + 2xy
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Answered by Matthew C. • Maths tutor
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Simplify: 4 - 2x + x2 + 2x + 4

4 - 2x + x 2 + 2x + 4 = x 2 + 8
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Answered by Matthew C. • Maths tutor
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