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Work out the increase in price from £1.50 to £2.00 as a percentage.

To find the increase in price, you have to find the change in price and then compare that to the original price. The change in price is found by doing new price-old price (£2.00-£1.50=£0.50). You then find i...
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Answered by Alice K. • Maths tutor
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Fully simplify this equation; 3x^3 - x(3x+36) = 0

The first step is to multiply out the bracket 3x 3 - 3x 2 - 36x = 0 Then remove the common factor 3x 3x(x 2 - x - 12) = 0 Then factorise the bracket, by looking for two numbers which multiply to give -12, an...
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Answered by Rachel O. • Maths tutor
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Solve: 7x - 20 = 3x + 4

7x = 3x + 24 4x = 24 x = 24 / 4 x = 6
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Answered by Alex G. • Maths tutor
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Find the integral between 1 and -2 for (4-x^2-3x^3)

= [4x - 1/3x 3 - 3/4x 4 ] 1 -2 = (4(1) - 1/3(1) 3 - 3/4(1) 4 ) - (4(-2) - 1/3(-2) 3 - 3/4(-2) 4 ) =(2 11/12) - (-8 + 8/3 - 12) =(2 11/12) - (-17 1/3) = 20 1 /4
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Answered by Alex G. • Maths tutor
3972 Views

(x + 2)(x + 3)(x + 6)

First: (x + 2)(x + 3) = x 2 + 5x + 6 Second: (x 2 + 5x + 6)(x + 6) = x 3 + 5x 2 + 6x + 6x 2 + 30x + 36 = x 3 + 11x 2 + 36x +36 Answer: = x 3 + 11x 2 + 36x +36
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Answered by Urma C. • Maths tutor
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