Year 11 Mini-Assessment 7 HIGHER Algebra Forming & Solving Equations.

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Presentation transcript:

Year 11 Mini-Assessment 7 HIGHER Algebra Forming & Solving Equations

 12  5x – 3 = 2x + 6 3x – 3 = 6 12y = 96  3x = 9 y = 8  x = 3

 118 Corresponding angles are equal Angles on a line add up to 180°  4x – 6 = 7x – 99  3y – 25 + 118 = 180 – 6 = 3x – 99 3y + 93 = 180 93 = 3x 3y = 87   31 = x y = 29

(signs can be wrong way round for this mark)  12 (x + 4)(x + 4) 12 12 (x + 4) 6 6 6 6 6 6(x + 4) 36 12 6 (x + 4)  (a) (x + 4)(x + 4) + 6(x + 4) + 36  x2 + 8x + 16 + 6x + 24 + 36 = x2 + 14x + 76 (b) x2 + 14x + 76 = 252   x2 + 14x – 176 = 0 Perimeter = 72cm (signs can be wrong way round for this mark) (x + 22)(x – 8) = 0  x = -22 or x = 8