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Solve the simultaneous equations: 1) 4x - 2y = 28, 2) 4y - 3x = -36.

Before starting, look whether either equation has common factors. Equation 1 does common factor 2, so divide it by 2 both sides to get 1) 2x - y = 14. Rearrange 1) to get one unknown in terms of the other...

Answered by Aaron H. • Maths tutor

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Tommy, Anna and Jacob all have 40 sweets. they decide to split the sweets between each other in the ratio 1:4:5. Calculate how many sweets each get, rounding down your answer where necessary.

1+4+5=10. 40/10 = 4. 1 x 4= 4 = 4 sweets for Tommy. 4 x 4 = 16 sweets for Anna. 5 x 4 = 20 sweets for Jacob

Answered by Praveen M. • Maths tutor

3076 Views

factorise and simplify (x^2+4x+4)/(3x^2+15x+18)

Factorise: Top (x^2+4x+4) = (x+2)^2Bottom (3x^2+15x+18) = 3(x^2+5x+6) = 3(x+3)(x+2)Simplify: ((x+2)^2)/(3(x+3)(x+2)) = (x+2)/(3(x+3))

Answered by Nikita S. • Maths tutor

3017 Views

How do I expand (2x+5)(9x-2)?

First, remember that a set of closed brackets directly beside a single term/another set indicates that they are being multiplied. The key to expansions like this is to do it a particular order every time ...

Answered by Meron E. • Maths tutor

3045 Views

Identify two errors made by a student asked to evaluate the following integral (Will upload question to less space)

Error 1: expressed 3/x^(1/2) incorrectly. Should be 3x^-(1/2), not 3x^(1/2).Error 2: subtracted the larger area from the smaller area after substituting the unknowns with the given limits value.

Answered by Seun L. • Maths tutor

4681 Views