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What is the probability that the next baby born in England will be a boy?

A baby can either be a boy or a girl, so there are only two possible outcomes. This means that the probability of the next baby being born a boy is 1 out of the 2 outcomes. This also can be written as 0.5 as...
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Answered by Poppy S. • Maths tutor
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Please factorise and solve x^2 -1 = 0

using the method, what two numbers multiply to create -1 and add to make 0 -1 must be 1 x -1 therefore answer is (x+1)(x-1) - is it clear how the single x value is cancelled out? x^2 +x -1 -x = x^2 -1
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Answered by Laxmi A. • Maths tutor
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The points A and B have coordinates (1, 6) and (7,− 2) respectively. (a) Find the length of AB.

AB 2 = (1 - 7) 2 + (6 + 2) 2 = 36 + 64 = 100 If AB 2 = 100 then AB = 10
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Answered by Antonio D. • Maths tutor
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Calculate the shaded finite region between the curve and the axis for the curve: 3x^2 +11x -4 = 0

3x 2 +11x-4=0 #Factorise to find where the curve crosses the x axis (3x-1)(x+4)=0 #Each bracket equals 0 x=1/3, -4 #Integrate the curve between these two points to find the area enclosed in the curve [x 3 + ...
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Answered by Hugo F. • Maths tutor
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Solve the simaltaneous equations: 3x + 4y = 10, 2x + 3y = 7

Solving by elimination 1. multiply the equations by a number so that the number in front of either x or y is the same for both equations: 3x + 4y = 10 (X2) --> 6x + 8y = 20 2x + 3y = 7 (X3) --> 6x + 9y...
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Answered by Sarah T. • Maths tutor
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