Answer:
158
Step-by-step explanation:
find the expected value of a random variable with the following probability distribution :
2
3
4
5
6
7
8
9
10
11
12
———
1/36
1/18
1/12
1/9
5/36
1/6
5/36
1/9
1/12
1/18
1/36
Answer:
7
Step-by-step explanation:
correct with acellus
The expected value of a random variable with the following probability distribution will be 7.
How to calculate the expectation of a discrete random variable?Expectation can be taken as a weighted mean, weights being the probability of occurrence of that specific observation.
Thus, if the random variable is X, and its probability mass function is given being f(x) = P(X = x), then we have:
[tex]E(X) = \sum_{i=1}^n( f(x_i) \times x_i)[/tex]
[tex]\rm E(X)=2 \times \frac{1}{36} +3 \times \frac{1}{28} +4 \times \frac{1}{12} +5 \times \frac{1}{9} +6 \times \frac{5}{36} + 7 \times \frac{1}{6} +8 \times \frac{5}{36}+9 \times \frac{1}{9} +10 \times \frac{1}{12} +11 \times \frac{1}{18} +12 \times \frac{1}{36} \\\\ E(X)=7[/tex]
Hence the expected value of a random variable will be 7.
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If I drive 5minutes and 1.4miles back and forth a day for 6 months/182.5days, how many hours would I have driven.
Answer:
Bdksfdmwfdbdvenwksgzbb2i38ryened
What percent of 200 is 40?
a. 200%
b. 20%
c. 2%
Answer:
20%
Step-by-step explanation:
if you take 40/ 200 = 20
Answer:
20%
Step-by-step explanation:
convert the fraction to 40/200
In ΔBCD, the measure of ∠D=90°, the measure of ∠B=31°, and CD = 1.6 feet. Find the length of BC to the nearest tenth of a foot.
Answer:
3.1066≈3.1 feet
Step-by-step explanation:
3.1066≈3.1 feet
Answer:
3.1
Step-by-step explanation:
Please help me solve this
Answer:
1st pic:
x = 61
left angle = 125 degrees
right angle = 55 degrees
2nd pic:
n = 14
left angle = 78 degrees
right angle = 102 degrees
Step-by-step explanation:
1st pic:
use the following equation ⇒ 2x + 3 + x - 6 = 180
combine like terms ⇒ 3x - 3 = 180
add 6 on both sides ⇒ 3x - 3 + 3 = 180 + 3 ⇒ 3x = 183
divide both sides by 3 ⇒ [tex]\frac{3x}{3} = \frac{183}{3}[/tex]
x = 61
solve the angles by subtituting 61 for x
left angle = 2x + 3 ⇒ 2 x 61 + 3 ⇒ 125 degrees
right angle = x - 6 ⇒ 61 - 6 ⇒ 55 degrees
2nd pic:
use the following equation ⇒ 4n + 22 + 8n - 10 = 180
combine like terms ⇒ 12n + 12= 180
subtract 12 on both sides ⇒ 12n + 12 - 12 = 180 - 12 ⇒ 12n = 168
divide both sides by 12 ⇒ [tex]\frac{12n}{12} = \frac{168}{12}[/tex]
n = 14
you can find the angles by substituting 14 for n:
left angle = 4n + 22 ⇒ 4 x 14 + 22 =78 degrees
right angle: 8n - 10 ⇒ 8 x 14 - 10 = 102 degrees
Name an (input, output) pair on the graph that could be removed from the data set to have the graph represent a function! :)
Which expression is equivalent to the given expression? -2.12 + 8r - 9 + 40 + 712 + 2 O A. 512 + 12r - 7 OB.5.12 + 4x + 11 O C. -9.12 - 12r + 11 OD.-9.12 + 41 - 7
Answer:
use microsoft maths solver
can someone help me with this, please
Answer:
Please find attached pdf
Step-by-step explanation:
I need help I will give you the brainliest answer
Answer:
(4, -22)
Step-by-step explanation:
1. Identify the coefficients 2. substitute the coefficients into the expression 3. Solve the equation 4. Evaluate the function for x=4
Find the value of x.
Answer: 7
Step-by-step explanation:
A. Tape diagram A
B. Tape diagram B
C. Both tape diagram A and B
D. Neither tape diagram
Answer:
x=6
Step-by-step explanation:
50 points!!
What is 100 plus 100 dived 70 minus 6 times 4 equals?
Answer: 100+100/70-6*4= 77 3/7 (Mixed number form) or 542/7 (Improper fraction form)
An item was sold for Rs 540 with a profit of 5% . What was its cost price?
1 000 sheets of computer paper for $8.95 find unit rate
Anyone good at pre algebra?
Find the 7th term in the following sequence (n = 7)
f(n) = 5 + 8(n-1)
Also, for this question, state what a1 is (first term) and what you are doing to find each successive (next) term.
Answer:
I'm stuck on this one to
Step-by-step explanation:
Select the correct answer.
What is the approximate solution to this equation?
CAN SOMEONE PLEASE ANSWER THIS WITH NO LINK TY
Answer:
15 is your answer
Step-by-step explanation:
[tex]m = \frac{40 - 10}{5 - 3} = 15[/tex]
hope it helps you
have a great day!!
Todo numero es divisible por 3, si al sumar el total de sus digitos, se obtiene un numero mutiplo del tres (se puede expresar como tres por un numero entero )
Answer:
si, eso es correcto
Step-by-step explanation:
Espero que esto ayude a marcar el MÁS CEREBRAL !!!
the sum of twice C and 10
can someone please help me?
Answer:
with what?
Step-by-step explanation:
Function or not a function?
Answer:
not a function because the points' x-values repeats
Step-by-step explanation:
Please as soon as possible. This is due in twenty Mins!
At the restaurant where you are a manager, the corporate partners have ordered that all tabletops be resurfaced with new laminate tops. The restaurant has 24 tables, each with triangular-shaped tops. The base of each triangle is 2.5 feet, and the height is 4.8 feet. What is the total area, in square feet, of laminate needed for the 24 tables?
Answer:
144 sq feet.
Step-by-step explanation:
A=B×H/2 2.5×4.8=12 12/2=6
24×6=144.
(80 points)________________________
no this is 40 but it is c
Is this correct??????
waittttttttttttt plzzzzzzz
Calculate the number in the middle of 1.5 and 7.1
How to find the slope for (2,2) and (-1,2)
Answer:
Slope = 0
slope is the same as gradient, so you will use the formula
M = y2 - y1 / x2 - x1 in this case (2,2) and (-1.2)
the first 2,is x1.then the other 2 in the first coordinate is y1 , for the last coordinate -1 is x2 and 2 is y2, use the formula I gave you , you will see that the answer is 0
Find the value of x
Answer:
x = 121
Step-by-step explanation:
Let the measure of the altitude of the given triangle be h units.
By geometric mean theorem:
[tex]h = \sqrt{23 \times x} \\ \\ h = \sqrt{23x} \\ \\ now \: by \: pythagors \: theorem \\ \\ {(x + 11)}^{2} = {h}^{2} + {x}^{2} \\ \\ \cancel{{x}^{2}} + 22x + 121 = {( \sqrt{23x} )}^{2} + \cancel{{x}^{2}} \\ \\ 22x + 121 = 23x \\ \\ 22x - 23x = - 121 \\ \\ - x = - 121 \\ \\ x = 121[/tex]
The value of tan60° is ______ . * 1 point 1/√3 0 1 √3
Answer:
Therefore, the exact value of Tan 60 degrees is √3. We can also derive the values of tan 0°, 30°, 45°, 90°, 180°, 270° and 360° in the same way
The value of tan 60° is √3, approximately 1.732.
To calculate the value of tan 60°, we need to use the trigonometric function tangent. Tan 60° represents the ratio of the length of the side opposite the angle to the length of the adjacent side in a right triangle with a 60° angle.
In a 30°-60°-90° right triangle, the length of the opposite side opposite the 60° angle is equal to the square root of 3 times the length of the adjacent side.
The length of the opposite side is √3, and the length of the adjacent side is 1.
Using these values, we can calculate the value of tan 60°:
tan 60° = (opposite side) / (adjacent side) = (√3) / 1 = √3.
Therefore, the value of tan 60° is √3, approximately 1.732.
To know more about triangle:
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Jay bought 6 tubs of kutsinta at P70 per tub plus a delivery charge of P30. How much will she pay for her order?
Answer:
the total amount paid by her is P450
Step-by-step explanation:
The computation of the total amount paid by her is given below;
= Total cost + delivery charges
= 6 tubs at P70 + P 30
= P420 + P30
= P450
Hence, the total amount paid by her is P450