Answer:
a. 248.14
b. 220.576
Step-by-step explanation:
The weighted mean can be calculated as
Xbarw= sumwx/sumw
where x are the observations and w are the weights of the observations.
a.
x w wx
248.13 3 744.39
248.06 1 248.06
248.18 2 496.36
248.15 3 744.45
sumwx=744.39+248.06+496.36+744.45=2233.26
sumw=3+1+2+3=9
Xbarw= sumwx/sumw
Xbarw= 2233.26/9
Xbarw= 248.14
The weighted mean for line BC is 248.14.
b.
x w wx
248.13 1 248.13
248.06 1 248.06
248.18 3 744.54
248.15 3 744.45
sumwx=248.13+248.06+744.54+744.45=1985.18
sumw=3+1+2+3=9
Xbarw= sumwx/sumw
Xbarw= 1985.18/9
Xbarw= 220.576
The weighted mean for line BC is 220.576.
The weighted mean of line BC for the first given weights is 248.13. The weighted mean for the revised weights is 248.14.
The weighted mean of a set of values is calculated by multiplying each value by its weight, summing those products, and then dividing the sum by the total of the weights. So we will first multiply each distance by its corresponding weight then add them all up and divide it by the sum of weights. Let's calculate.
#SPJ3
Answer:
380$
Step-by-step explanation:
Multiply 400*5%=20
Then subtract 400-20=380
Answer:
$380
Step-by-step explanation:
12 it
8
15 ft
What is the distance from point A to point B in feet?
A. 8ft B.7ft c.9ft D.6ft
The requried measure of the AB is given as 7ft. Option B is correct.
In a right-angled triangle, its sides, such as hypotenuse, and perpendicular, and the base is Pythagorean triplets.
Here,
From the diagram, applying Pythagoras' theorem to the right rectangle,
BC² = 15² - 12²
BC² = 81
BC = 9
Now,
AC = 16
AB + BC = 16
AB + 9 = 16
AB = 7 ft
Thus, the requried measure of the AB is given as 7ft. Option B is correct.
Learn more about Pythagorean triplets here:
#SPJ2
Answer:9 ft
Step-by-step explanation:
The number of hits by each player will be 1476 and 1197.
The distribution of weights to the variables involved that establishes the equilibrium in the calculation is referred to as a result.
Together teammates Pedro and Ricky got 2673 base hits last season. Pedro had 279 more hits than Ricky.
Let x be Pedro hits and y be Ricky hits. Then the equations will be
x + y = 2673 ...1
x = y + 279 ...2
From equations 1 and 2, then we have
y + 279 + y = 2673
2y = 2394
y = 1197
Then the value of x will be
x = 1197 + 279
x = 1476
The number of hits by each player will be 1476 and 1197.
More about the solution of the equation link is given below.
#SPJ2
x+6y=-3
Would you rather use subtraction or addition to solve the system? Explain
your reasoning. (Lesson 2-14)
It is more convenient to use addition to solve the system of equations as it eliminates one of the variables when the equations are added. The solution to the system of equations is x = -6 and y = 1/2.
To solve the given system of equations, it is generally more convenient to use addition rather than subtraction. This is because addition eliminates one of the variables when the equations are added together, making it easier to solve for the remaining variable. Let's see how:
Adding the two equations together eliminates the 'x' variable:
-x + 6y + x + 6y = 9 + (-3)
12y = 6
Now, we can solve for 'y' by dividing both sides by 12:
y = 6/12 = 1/2
Substituting the value of 'y' back into either of the original equations, we can solve for 'x':
-x + 6(1/2) = 9
-x + 3 = 9
-x = 6
x = -6
Therefore, the solution to the system of equations is x = -6 and y = 1/2.
Answer:
Step by step
Step-by-step explanation:
I need points lol
the rental shop applies a fine for 9p for every day the dvd is overdue
work out the total fine paid by amelia
give your answer in £?
Step-by-step explanation:
9p*30days= 45p
45÷100=0.45£
The correct answer would be No fine is paid if the DVD is returned by the due date, because the first 0 means it is 0 days overdue, so it is returned on time, and the second 0 means the fine would be $0!!