Answer:
Step-by-step explanation:
Solve for the mean (average) of the five test scores.
Subtract that mean from each of the five original test scores. Square each of the differences.
Find the mean (average) of each of these differences you found in Step 2.
Take the square root of this final mean from #3. This is the standard deviation.
Answer:
what type of math is this? i can probably help
Step-by-step explanation:
Answer: For every cup of flour we need 2/3 cups of sugar.
For every cup of sugar you need 3/2 cups of flour.
Step-by-step explanation:
Answer:
1/32
Step-by-step explanation:
You plug 7 for n and solve in calculator.
Let the speed for the first 12 mi be x mi/h, the speed for 18 mi was (x+4) mi/h
thus given that
time=distance/speed
the average time will be:
3=(12+18)/(x+x+4)
3=30/(2x+4)
solving for x we get
3(2x+4)=30
6x+6=30
6x=24
x=4 mi/hr
Answer: 12 mi/hr
