Answer: 
Step-by-step explanation:
Given
Sample of 12 measurements has a mean of 16.5 and
a sample of 15 measurements has a mean of 18.6
Take
be the mean and no of measurements
and
be the mean and no of measurements in second case

Similarly,

Mean of 27 measurements

(30x7)+(7x5) you basically just have break it up.I hope this really helped you.
The first one the height of the candle remains the same after many minutes the second one the water in a storage tank decreas. Find slope by using slope formula
Answer:
Susan jogged 1 1/8 miles
Step-by-step explanation:
4 1/2= 18/4. 18/4 ÷ 1/4= 1.125= 1 1/8
Ans hb 420
Step-by-step explanation: