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Expand (2x + 5)(9x - 2).

Use the FOIL method:F - FIRST: the first term in either bracket, multiply: 2x(9x) = 18x 2 . O - OUTSIDE: the terms further from the centre of the brackets, multiply: 2x(-2) = -4x. I - INSIDE: the terms close...
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Answered by Aaron H. • Maths tutor
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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. I...
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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
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Answered by Praveen M. • Maths tutor
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Explain 2 limiting factors of photosynthesis and how can they be removed

There are many limiting factors of photosynthesis (light, temperature, water, carbon dioxide) but we'll focus on light and temperature: Chlorophyll absorbs light at certain wavelengths and light needs to be ...
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Answered by Nikita S. • Biology tutor
3907 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))
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Answered by Nikita S. • Maths tutor
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