Answer:
9
Step-by-step explanation:
we know by definition that

so now we evaluate

and if we want to do an extra step

which works.
Answer:
Average = -1°C
Step-by-step explanation:
The data recorded is;
6, -7, -5, 5, -8, 3 (in °C)
Average =
= -1°C
Answer:
Yes you are correct. 9/20 is correct.
Step-by-step explanation:
7
/10 - 1
/4 =
7 * 2 / 10*2
1 * 5 / 4 * 5 = 14
/20 -5
/20 =9
/20