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Solve the simultaneous equations: 3x-y=1, x^2+y^2=5
x=1, y=2
x=-2/5, y=-11/5
Answered by Chloe W. •
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There are some people in a cinema. 3/5 of the people in the cinema are children. For the children in the cinema, number of girls:number of boys = 2:7. There are 170 girls in the cinema. Work out the number of adults in the cinema.
Solve simultaneously. x^2+y^2 = 25 ; y - 3x = 13
Factorise the Quadratic: 3x^2 + 2x - 1.
5y + 1 = 3y + 13
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