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​Simultaneous Equations: Quiz 3 - Answers
1) x = -2.4 to -2.2, y = -1.7 to -1.5
x = 1.2 to 1.4, y = 5.5 to 5.7

2) x = 0.2 to 0.4, y = 1 to 1.2
x = 1.6 to 1.8, y = -3.2 to -3

3) ​x = -2.2 to -2, y = 0.8 to 1
x = -0.5 to 0.3, y = 1.7 to 1.9
x = 2.4 to 2.6, y = 3.2 to 3.4

Working
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Questions
Solve the simultaneous equations by using the graphical method. Give your answers to 1 decimal place. You may use a calculator. 
Click here for a printable version of the graphs for the questions in this quiz. 
​

1) y = x2 + 3x

y = 2x + 3

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2) y = 2x2 – 7x + 3

y = -3x + 2

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3) y = x3 – 5x

y = ½ x + 2

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