Question

Please help me with this

Answer 1

a)
7-5 = 2
12/2 = 6
6*7 = 42
5*6 = 30
Answer:
42  and 30

b)
mean of 9
mode of 7
three numbers:
7+7+a = 9*3
14+a = 27
a = 27-14
a = 13

Answer:
7 and 7 and 13