2 marksSubstitution in Algebraic Expressions

CSEC Mathematics · Question 4(a)(iii)

The equation of a straight line, l, is given as 3x - 4y = 5.

The point P with coordinates (r, 2) lies on the line l. Determine the value of r.

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Other parts of this question

4(a)(i)Write the equation of the line, l, in the form y = mx + c.[2 marks]
4(a)(ii)Hence, determine the gradient of the line, l.[1 mark]
4(a)(iv)Find the equation of the straight line passing through the point (6, 0) which is perpendicular to l.[2 marks]
4(b)(i)Draw the straight lines x + y = 10 and y = x on the grid below.[2 marks]
4(b)(ii)On the same grid, shade the region which satisfies the FOUR inequalities x ≥ 0, y ≥ 0, x + y ≤ 10 and x ≥ y.[2 marks]

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