O-LevelMathematicsAlgebra and graphs4024/12 · Oct/Nov 2015 · Q255 Marks
Find the value of 1.5.
- (a)Find the value of 1.5.[1]
- (b)Evaluate the expression 15k - 75; or 15(k-5).[2]
- (c)(i)Draw a horizontal line from (0, 12), going to, or beyond, t = k.[1]
- (c)(ii)Solve a problem to get 25, or follow through for correctly solving 12k = their (b), provided k > 10.[1]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2015). The mark or mark type is shown in brackets.
- [1] (a) 1.5
- [2*] (b) 15k – 75; or 15(k-5)
- M1 for ½ × 10 × 15 + (k − 10) × 15 oe seen
- [1] (c) (i) Horizontal line from (0, 12), going to, or beyond, t = k.
- [1*] (ii) 25 WWW or FT for correctly solving 12k = their (b), provided k > 10
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