Answer:
it took him 10 mintues to run 5 laps
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given

Required
Solve for w

In absolution functions;

So, the given expression can be rewritten as

Removing the absolute sign, will gibe
or 
When the second inequality os rewritten, it gives
or 
Reorder both inequalities
or 
Lastly, both inequalities are combined

Answer:
5 erasers.
Step-by-step explanation:
0.35e + 0.15p = 2.80
e + p = 12
e = 12 - p
0.35(12 - p) + 0.15p = 2.80
4.2 - 0.35p + 0.15p = 2.80
4.2 - 0.2p = 2.80
-0.2p = -1.4
-0.2p/-0.2p = -1.4/-0.2
p = 7
e = 12 - 7
e = 5
Answer: Tammy's sample may not be vaild because she surveyed the students only from her class and it is likely that other classes might not like the subject maths. She might get the accurate results by surveying a larger number of people in the school instead of just her class.