The random variable r has a mean μ = 10 and σ = 4. For the variable s, the μ = 7 and σ = 3. The mean of r-s will be obtained by arithmetic subtraction of the μ for r and a. The standard deviation isn't independent since it's obtained by square root of the variance of a distribution. The standard deviation will be obtained by obtained through the square root of the squared sum of σ.
μ (r-s) = μ(r) -μ(s)
μ (r-s) = 10 -7 = 3
σ (r) -σ(s) = √(σ (r))²+ (σ (s))²
σ (r) -σ(s) = √(4²+ 3²)
σ (r) -σ(s) = √(16+ 9)
σ (r) -σ(s) = √25 = 5
thus, the mean is 3 and the standard deviation is 5.
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Is this relation a function? Justify your answer.
11
10
9
8
7
6
5
4
3
2
1
1 2
4 5
6 7 8 9 10 11
A. Yes, because every x- and y-value is positive.
B. No, because two points with the same y-value have different x-
lues
C. Yes, because every x-value corresponds with a single y-value.
D. Yes, because the number of x-values is the same as the number of
y-values
PLEASE I NEED HELP FOR THIS TEST
Simplify the difference. Write your answer in standard form.
2) (8r - 4r + 8) - (5r - 8 + 7r")
A) -24r + 3r + 16
B) 3r + 13r + 16
C) -11p+ 3r + 16
D) -317 + 3r + 16
Answer:
- 11r³ + 3r + 16
Step-by-step explanation:
( 8r - 4r³ + 8 ) - ( 5r - 8 + 7r³ ) =
= 8r - 4r³ + 8 - 5r + 8 - 7r³ =
= - 11r³ + 3r + 16
Can you help me pls with this one :/
Answer: Angle BEC is also 45 degrees.
Step-by-step explanation: This is because the opposite and congruent angle of BEC is 45 degrees. Congruent means the same. Therefore, Angle BEC is 45 degrees.
Tan's electricity bill for the month of August was $267.00. His September bill decreased 8% from the amount he was billed in August. How
much was Tan's September bill?
Answer:
245.64
Step-by-step explanation:
His Sept. bill is 92% of August.
$267.00 x .92 = $245.64
HELP HELP HELP HELP HELP HELP PLEASE!!
Answer:
A
Step-by-step explanation:
I took the test
Write an expression that represents the total owed for 6 months of cable at a price of c dollars for each month, plus a one-time equipment fee of $50? 6(c) + 50 6(c + 50) 2(50) + c 50c + 6
The expression which represents the total owed for 6 months of a cable according to the description as in the task content is; 6(c) +50.
What is the expression that represents the total owed for 6 months?According to the task content; the expression that represents the total owed for 6 months of cable at a price of c dollars for each month, plus a one-time equipment fee of $50 is to be determined.
Hence, since the one-time equipment fee is; 50$ and it costs c dollars per month, the total cost for all six months is;
= (6×c) + 50
= 6(c) +50.
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Find the value of x in this picture.
Answer:
i dont see a pic
Step-by-step explanation:
Find the missing angle measurements.
79°
75°
56°
80°
85°
55°
Answer:
Step-by-step explanation:
Answer:
This is the correct answer
Step-by-step explanation:
Help please your guys are smart
Will mark brainliest for whoever answers
Answer:
D
Step-by-step explanation:
Correlation coefficient is the leading coefficient of the line of best fit. We can estimate the slope by looking at the plots. The plots are moving in a positive slope so we can remove B and C and E.
We're left with slope of 1 and 0.5
We can faintly imagine the line of slope 1. It doesn't really fit. SO it is 0.5
Need help for this one!
Find the redies and diameter of a circle with a circumference of 24 min
Step-by-step explanation:
I assume you mean radius.
Circumference of a circle=2πr
24=2πr(transpose for r)
r=24/2π=3.8197≈4
Diameter=2r
=2×4=8
I will mark brainlist!
Answer: D
Step-by-step explanation:
because if you flip it to the right shape you can see what side is similar
to which
PLEASE HELP ME I NEED THIS ALOT!
1 . Write the equation that represents the data set for Crew A using the variables E for earnings and h for hours.
2. Write the equation that represents the data set for Crew B using the variables E for earnings and h for hours.
Please help i'm really stuck on these questions!! :(
1. Write the equation that represents the data set for Crew A using the variables E for earnings and h for hours.
120e/1h
2. Write the equation that represents the data set for Crew B using the variables E for earnings and h for hours.
105e/1h
FILL IN THE BLANKS: The solution to a system of equations is where two
lines
A system can be solved by graphing, substitution, or
If two lines are
there will be no solution. If the
two lines are the same, they will have solutions. *
.
O intersect...solving....intersecting...two
O intersect... elimination...parallel...infinite
O intersect...slope...parallel..infinite
O intersect...elimination...perpendicular...one
20 POINTS NEED HELP ASAP WILL MARK BRAINLIST
Find f(3) for f(x) = -5x – 2
Answer:
-17
Step-by-step explanation:
F(3) find f(x) = -5x - 2
As u can see instead of x inside the parentheses it's a 3, meaning we have to replace x with 3 in the equation
f(3) = -5x - 2
f(3) = -5(3) - 2
f(3) = -15 - 2
f(3) = -17
The cylindrical part of an architectural column has a height of 320 cm and a
diameter of 30 cm. Find the volume of the cylindrical part of the column. Use
3.14 for rand round your answer to the nearest cubic centimeter if needed.
30 cm
320 cm
A. 904,320 cm3
B. 226,080 cm3
C. 75,360 cm3
D. 72,000 cm3
Answer:
226,080 cm3
Step-by-step explanation:
Answer:
226, 080- (B)
Step-by-step explanation:
Ap3x
A car park space needs 8 square metres for 1 car. just considering the spaces for parking, what dimensions for a car park would be needed for 60 cars
The dimensions of a car park for 60 cars is: 480 m^2
To solve this exercise we have to do a mathematical operations of multiplication with the given information.
Information about the problem:
car park space = 8 m^2/cardimensions for a car park (60 cars) = ?To know the dimensions for the car park of 60 cars we have to do the following multiplication:
dimensions for a car park (60 cars) = car park space * 60 cars
dimensions for a car park (60 cars) = 8 m^2/car * 60 cars
dimensions for a car park (60 cars) = 480 m^2
What is multiplication?It is a mathematical operation that consists of adding the same number, called the multiplicand, as many times as indicated by another number, called the multiplier. The result is called the product.
Example: 2+2+2= 6 is equal to say 2*3= 6
Multiplied * multiplier = product
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Q4. One card is drawn at random from a pack of 52 playing cards. Find the probability of choosing a black card between the numbers 5 and 10 (inclusive). A. 3/13 B. 1/13 C. 1/2 D. 4/13
Answer: b 1/13
Step-by-step explanation: SolutionTotal cards: 52Number of face card: 12
Probability of getting a face card:
P(F)=12/52 = 3/13
Probability of not getting a face card:
P(F ′ )=1−P(F)=1− 1/13 = 10/13
Answer both and ill give brainiest please my parents hurt me for bad grades
Answer:
1. 8xc=360t . 2. The cost of burritos is 50 and tacos is 150.
Step-by-step explanation:
Calvin purchased a new office desk on July 23, 2018, at a cost of $2,373. He did not claim the bonus depreciation deduction. Using the half-year convention, Calvin may claim 2018 depreciation in the amount of Calvin purchased a new office desk on July 23, 2018, at a cost of $2,373. He did not claim the bonus depreciation deduction. Using the half-year convention, Calvin may claim 2018 depreciation in the amount of ?
Answer:
$339
Step-by-step explanation:
Calculation for the amount of Depreciation that Calvin may claim 2018 Using the half-year convention
Based on the information given we were told that he purchased a new office desk at the amount of $2,373 which means that the new office desk using the half-year convention will be a 7 year property.
Hence,
The Standard Depreciation percentage of the new office desk which is a 7 year property is 14.29% based on this the amount of Depreciation that Calvin may claim 2018 Using the half-year convention will be calculated as:
Using this formula
Depreciation=Cost of new office desk* New office Desk Depreciation percentage
Let plug in the formula
Depreciation=$2,373*14.29%
Depreciation=$339
Therefore Using the half-year convention Calvin may claim 2018 depreciation in the amount of $339
there are 20% more goblins than wizards in magic club there are 120 goblins in magic club
Answer:
Final Answer: There are 100 wizards in the magic club
Step-by-step explanation:
Since this question is asking for how many wizards are in magic club, we can represent wizards with the variable "w"
w = wizards
Next, we know that there are 120 goblins and that there are 20% more goblins than wizards in magic club.
120 = w + 20%w
120 = w + 0.2w
(percentages are just the percent/100)
120 = 1.2w
1200 = 12w
100 = w
Use the distance formula to find the distance between
(-5, 6) and (8,4). Round to the nearest tenth if
necessary.
Answer:
13.2Step-by-step explanation:
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}\\\\(-5,6)\quad\implies\quad x_1=-5\,,\ y_1=6\\\\(8,4)\quad\implies\quad x_2=8\,,\ y_2=4\\\\\\d=\sqrt{(8+5)^2+(4-6)^2}= \sqrt{13^2+(-2)^2}=\sqrt{169+4}=\sqrt{173}\approx13.2[/tex]
Help me with this problem please
Answer:
the answer is B
Step-by-step explanation:
Find the value of “X”
Answer:
x = 55
Step-by-step explanation:
A triangle equals 180 degrees, b will be used to find the missing angle.
21 + 34 + b = 180
55 + b = 180
subtract 55 from both sides
b = 125
A straight line is 180 degrees and the b, the missing angle, and x are supplementary angles so
125 + x = 180
x = 55
GOT THESE FREAKING WORD PROBLEMS MAN I SUCK AT THESE THINGS PLS HELPPPPPPPP!!!! THERES MORE AFTER THIS TOOO!!!!!!!
Answer:
11. 1st option
12. 2nd option
Step-by-step explanation:
add or subtract the following fractions. write in simplest form.
3/4 - 3/10
Answer:
I got 9/20
Hope that helps!
Can someone answer my English question, please :/ I will mark you brainliest
Answer:
Step-by-step explanation:
When paying for a restaurant order, a customer's total for food was $28.50. What is a 16% tip for that total?
Answer:
33.06
Step-by-step explanation:
you would do 28.5*0.16 and you would get 4.56 ss you would add that to the cost and you would get 33.06
Last year Lucy made $87.32 house-sitting for a neighbor and $82.29 mowing lawns. How much money did she earn in all?
Answer:
$169.61
Step-by-step explanation:
X = 87.32 + 82.29
X = 169.61
Answer:
$169.61
Step-by-step explanation:
87.32+82.29=169.61
need brainlyest plz