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In the exam you will have a ruler and a pair of compasses, which you can use to construct a 60 degree angle by drawing two arcs. You can then draw two more arcs to bisect that 60 degree angle and make a 3...
i) Square both sides of the expression to make x^2=(a-y)/b
Multiply by b to remove the fraction from the equation and then rearrange to make y the subject.
bx^2=a-y --> y=a-bx^2
i...
Area of a circle = pi × r2
Area of semi-circle = 1/2(Area of circle)
= 1/2(pi × r2)
Diameter = 2r
r = 8÷2 = 4
Area of semi-circle = 1/2(pi × 4APAnswered by Annabelle P. • Maths tutor8026 Views
To answer this question, we need to make y the subject of the second equation. We can do this through simple rearrangement:
y-3x=13 so y=13+3x
Now that we have y on its own, this means we ca...
y = 2x+5
y=x+1
First equate: 2x+5=x+1
Rearrage for x: 2x-x=1-5
Which gives: x=-4
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