A company makes muesli which contains nuts and sultanas. They counted the number of nuts in 50 individual serving packets. They drew a table Number of nuts
4-6
7-9
10-12
13-15
16-18
Midpoint (x)
5
8
11
14
17
Number of packets (f)
3
9
12
17
9
50
fx
15
?
?
?
?
?
a) Complete the table
b) Calculate an estimate for the mean.

What is the next step in the given proof? choose the most logical approach. a. statement: m 1 + m 2 + 2(m 3) = 180° reason: angle addition b. statement: m 1 + m 3 = m 2 + m 3 reason: transitive property of equality c. statement: m 1 = m 2 reason: subtraction property of equality d. statement: m 1 + m 2 = m 2 + m 3 reason: substitution property of equality e. statement: 2(m 1) = m 2 + m 3 reason: substitution property of equality