B -4-1 because the one is positive and the 4 is negative
Answer:
the first and last one
Step-by-step explanation:
Answer:
D
the first one obviously isnt random
the second one is selective then random
the third one is also selective
the fourth one is random
Answer:
1 ) a 2) b 3) d 4) b 5) a 6) c
Step-by-step explanation:
Answer:
20.3 units
Step-by-step explanation:
AB/CB = BD/AB
9/CB = 4/9
CB = 9×9/4
CB = 81/4 = 20¼ units
20.25 (20.3 units correct to 1 dp)
