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Maths
GCSE

Solve the following simultaneous equations: x^2 + 2y = 9, y = x + 3

When solving simultaneous equations, there are two methods: substitution and elimination. For this question, as one of the equations is a quadratic, the substitution method has to be used. The second equa...

Answered by Chloe L. Maths tutor
2607 Views

Factorise 6x^2 - 12x

common factor is 6x therefore it is 6x(x-2)

Answered by Huy H. Maths tutor
5340 Views

Simplify 125^-2/3

125^-2/3= 1/125^2/3=1/(cube root(125))^2=1/5^2=1/25

Answered by Amy W. Maths tutor
2734 Views

A prism with a triangular cross section has volume 120cm^3. The base of the triangular face has length 6cm. The width of the prism is 10cm. The height of the triangular face is h. Find h.

Cross sectional area: half base x height = (6/2)h = 3h , Volume of prism: Cross sectional area x width, this gives: 3h10 = 120, rearrange: 3h = 12, Find h: h = 4cm.

Answered by Jake V. Maths tutor
3801 Views

Factorise fully: 3x - 9x^2

3x(1-3x)

Answered by Jake V. Maths tutor
6147 Views

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