The Basics (Junior Cert Mathematics): Quizzes

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Intersecting Lines
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When two lines cross on the Cartesian Plane, what do they create?

A specific point

Why do we solve simultaneous equations when finding where two lines meet?

To find (x,y)(x, y) for both equations

What does the Junior Cycle method focus on when solving simultaneous equations?

Eliminating one variable

What are coefficients in an equation?

Numbers in front of variables

To eliminate a variable, what must you do with the coefficients?

Make them the same

What does 'back-substituting' mean?

Substituting found value into original

How should you write the solution for the point of intersection?

As a coordinate pair (x,y)(x, y)

In the example, what value of yy was found from 3y6=03y - 6 = 0?

y=2y = 2

In the example, what was the point of intersection?

(2,2)(2, 2)

What does 'isolate' mean when solving for a variable?

Get variable alone on one side

How should you check your work after finding xx and yy?

Substitute into original equations

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