Answer:
8
Step-by-step explanation:
Take 112/15
You get 7.4667
We make it 8 because you can't have .4667 of a class
Hope this helps
Let's figure this out as though we have no idea what the answer would be.
Step One
Find the new five numbers.
3*3, 8*3, 12*3, 17*3, 25*3
9 , 24 , 36, 51, 75
Step 2
Find the average
(9 + 24 + 36 + 51 + 75)/5 = 195/5 = 39
Step 3
Subtract the individual numbers from the average
(39 - 9) = 30
(39 -24) = 15
(39 - 36) = 3
(39 - 51) = - 12
(39 - 75) = -36
Step 4
Square the results from Step 3
30^2 = 900
15^2 = 225
3^2 = 9
(-12)^2 = 144
(-36)^2 = 1296
Step 5
Take the average of the results from step 4
(900 + 225 + 9 + 144 + 1296)/5
2574 / 5 = 514.8
Step 6
Take the square root of the result from step 5
deviation = sqrt(514.8)
deviation = 22.689
Step seven
Compare the two standard deviations.
s2/s1 = 22.689 / 7.563 = 3
Conclusion
If you are given 1 set of numbers to find a population standard deviation and you multiply each member by a, then the result will be a * the standard population deviation of the first set of numbers.
Note
Your calculator will do this as well, but you have to know how to enter the data into your calculator. That requires that you follow the directions carefully.
Answer:
77
Step-by-step explanation:im not correct
The amount invested in stocks is $2600 and the amount invested in bonds is $2100.
The total sum of money I invested is $4700. I invest x in stocks and y in bonds. This can be represented with this equation:
x + y = 4700 equation 1
The total interest I earned is $180. The interest rate on stocks is 4.5% and the interest rate on bonds is 3%. This can be represented with the equation
0.045x + 0.03y = 180 equation 2
These two equations are simultaneous equations and can be solved using the elimination method.
x + y = 4700 equation 1
0.045x + 0.03y = 180 equation 2
The first step is to multiply equation 1 by 0.045
0.045 + 0.045y = 211.50 equation 3
The second step is to subtract equation 2 from 3
31.50 = 0.015y
Divide both sides by y
y = $2100
To determine the value of x, substitute for x in equation 1
x + $2100 = $4700
x = $4700 - $2100
x = $2600
To learn more about simultaneous equations, please check: brainly.com/question/23589883?referrer=searchResults