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There are 300 students at a school who have been asked to attend assembly. 1/10 students are sat on chairs, 85% of students are sat on the floor, the rest do not attend assembly. How many students did not attend assembly?

300 x 1/10 = (300/10) x 1 = 30 students sat on chairs 85% of 300 = (300/10) x 8.5 = (30 x 8) + (30 x 0.5) = 240 + 15 = 255 students sat on the floor Students who did not attend = 300 - 30 - 255 = 15
JD
Answered by Jonny D. • Maths tutor
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AL
Answered by Adam L. • Maths tutor
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How do I factorise a quadratic equation?

A quadratic equation is one that takes the form.. ax 2 + bx +c = 0 Factorising an equation like this involves putting the equation into two brackets. The method varies slightly dependent on whether a = 1 or ...
BE
Answered by Beth E. • Maths tutor
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Algebraic fractions

9/3x 2 - 3y 2 + x/xy - x 2 = 9/3(x 2 -y 2 ) + x/x(y-x) = 3/(x-y)(x+y) + 1/y-x = 3/(x-y)(x+y) - 1/x-y = 3-1(x+y)/(x-y)(x+y) = 3-x-y/(x-y)(x+y)
TL
Answered by Tristan L. • Maths tutor
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A bag contains red discs, white discs and blue discs. 1/6 of the discs are red, 1/4 of the discs are blue. What is the smallest possible number of white discs?

We are given the fractions representing the number of discs in the bag. When comparing fractions, we should first find a common denomenator for them. The smallest common denomenator for 6 and 4 is 12 (4 3=12...
GC
Answered by Grimonia C. • Maths tutor
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