22 (a) 2 M1 correct length line or one correct end and line 3 A1 cao −2 (b) > 4.8 2 M1 for subtracting 3 from both sides or dividing all terms by 5 as a n first step (n = 4.8) A1 cao 3 B1 13 and 20 in correct positions 23 (a) Correct diagram M1 43 (= 23) or 60 43 13 (= 4) − 20 − − A1 correct diagram 1 B1 oe or ft Venn diagram for (b)
22 (a) −2 3 2 M1 correct length line or one correct end and line A1 cao (b) n > 4.8 2 M1 for subtracting 3 from both sides or dividing all terms by 5 as a first step (n = 4.8) A1 cao 23 (a) Correct diagram 3 B1 13 and 20 in correct positions M1 43 − 20 (= 23) or 60 − 43 − 13 (= 4) A1 correct diagram (b) 1 B1 oe or ft Venn diagram for
GCSE_Mathematics_2F_MS.docx