Answer:
-871
Step-by-step explanation:
Equation: -16x - 7
54th term: -16(54) - 7 = -864 - 7 = -871
To measure the exact quantity of things ;)
Answer:

Step-by-step explanation:
Given the expression 
Using law of indices: 

Also:13+8=21
Therefore:

Answer:
x=15
y=36
P=200
Step-by-step explanation:
Answer:
Felix
Step-by-step explanation:
The graph contains 3 segments,
first one is for the first 4minutes,
second one is for the next 2 minutes (standing still)
third one is for the last 2 minutes.
Only Felix has it right, the other students use absolute time in their statements, in stead of the difference between start and end. (e.g., from 4 to 6 is 2 minutes).