Looks like a badly encoded/decoded symbol. It's supposed to be a minus sign, so you're asked to find the expectation of 2X ² - Y.
If you don't know how X or Y are distributed, but you know E[X ²] and E[Y], then it's as simple as distributing the expectation over the sum:
E[2X ² - Y] = 2 E[X ²] - E[Y]
Or, if you're given the expectation and variance of X, you have
Var[X] = E[X ²] - E[X]²
→ E[2X ² - Y] = 2 (Var[X] + E[X]²) - E[Y]
Otherwise, you may be given the density function, or joint density, in which case you can determine the expectations by computing an integral or sum.
Part C
Question
Determine the missing values in the table.
Recall that x represents the number of tickets sold and y represents the amount of money earned from ticket sales.
Type the correct answer in each box. Use numerals instead of words.
X
$20
3
6
20
$400
Answer:
40$,160$ & 60
Step-by-step explanation:
First,find the equation using y-y1/ y1-y2=x-x1=x1-x2
y-0/0-20=x-0/0-3
y=20x/3
Now put the values of x& y in the equation, for the 1st one,
y=20×6/3
=40
2nd one.y=20×24/3
=160
3rd one,
400=20x/3
X=400×3/20
=60
The values at different number of tickets and the tickets that can be bought at $400 has been determined.
What is Direct Variation?When a variable varies directly with the other variable, i.e. on increasing one variable the other variable also increases, this relation is called Direct Variation.
Let x represent the number of tickets sold
Let y represent the amount of money earned from ticket sales.
y ∝ x
y = kx
k is the proportionality constant.
The value in the table will be used to determine the value of k,
For 3 tickets, the ticket amount is $20
20 = k * 3
k = 20/3
The relation is given by
y = (20/3) x
For 6 tickets, the value will be,
y = (20/3 ) *6 = $40
For 24 tickets the value will be,
y = (20/3) * 24 = $160
For $400, how many tickets can be bought,
400 = (20/3) * x
400*3 /20 = x
60 tickets can be bought for $400
To know more about Direct Variation
https://brainly.com/question/14254277
#SPJ5
IT WUU Tate for school on a
Given that 35.5% of them were men, 40% of them were women and the rest were
OXFORD
particular day, find the number of students who were punctual for school.
1800 people attended the National Day dinner in a certain constituency.
children, find the number of children who attended the dinner.
Answer:
Number of students = 441 Students
Step-by-step explanation:
Given:
Percent of women = 40%
Percent of women = 35.5%
Total number of people = 1,800
Find:
Number of students
Computation:
Percent of student = 100% - 35.5% - 40%
Percent of student = 24.5%
Number of students = 1,800 x Percent of student
Number of students = 1,800 x 24.5%
Number of students = 441 Students
N x 3/8 = 1 What is N?
Answer:
[tex]N=\frac{8}{3}[/tex]
Step-by-step explanation:
The image below shows step-by-step on how to solve it.
Hope this helps! :)
Write an equation that represents the tile pattern in the table below
Answer:
y=3x+2
Step-by-step explanation:
First find the slope or m in the line of equation y=mx+b
to find slope you need two points, plug in to y2-y1 / x2-x1
so lets use points (0,2) (1,5)
5-2 / 1-0 = 3
m=3
we have y=3x + b
now we find b by pugging in a point, let's use (0,2)
2 = 3(0) + b
b= 2
y=3x+2
please give thanks by hitting the heart button :)
simplify solution
[tex]6 \sqrt{4 \sqrt{2} } [/tex]
Answer:
16.97
Step-by-step explanation:
is y = 2x + 6 proportional or non-proportional?
Please help!!!! Will mark Brainliest!!!! Pleaseeee!! 20 Points!!!!
Simplify:
9x/2 - 4x - 3 = ?
Answer: Um, I think is [tex]\frac{x}{2-3}[/tex].
Step-by-step explanation:
Rosie receives a weekly salary of $350 and a 6% commission on all sales.
a.) write a function f (d) that model the weekly earnings in terms of d dollars in sales.
b.) Find Rosie's earnings for a week with $670 total sales.
Answer:
a) F(d)=350+0.06d
b)$390.2
Step-by-step explanation:
350+0.06(670)=390.2
Ariza paid $13.50 for 10 bottles of juice. Each bottle costs the same price. What is the price of one bottle of juice? $0.14 $0.74 $1.35 $3.50
Answer:
1.35
Step-by-step explanation:
13.50 divided by 10 = 1.35
The length of the base of an isosceles triangle is x. The length of a leg is 3x - 4. The perimeter of the triangle is 76. Find x.
X=
Answer:
12
Step-by-step explanation:
Hi!
We're given that the perimeter is 76. A triangle's perimeter is given by the sum of all of the sides. So, we'll find the lengths of the sides of the triangle and add them.
This is an isosceles triangle. The legs of an isosceles triangle are equal. In this problem, we're given the length of one leg: 3x-4. That means that the length of the other leg is also 3x-4. Now, the last side of the triangle is x ("base is x).
2(3x-4) + x = 76
6x-8+x=76
7x-8=76
7x=84
x=12
Let's check our answer.
3(12) - 4 =36-4 = 32
32 times 2 = 64 +12 =76
Correct!
1. The Honda Accord uses 192 gallons of gasoline to travel 6 miles. At this
rate, how many miles can the vehicle travel per gallon of gasoline? *
A1152 miles
B32 miles
C0.031 miles
D198 miles
If f(x)= x^2-2x+3, find the value of f (-2) and f(3)
Step-by-step explanation:
Given
f(x) = x² - 2x + 3
Now
f(-2) = (-2)² - 2 * ( -2 ) + 3
= 4 + 4 + 3
= 11
f(3) = 3² - 2 * 3 + 3
= 9 - 6 + 3
= 12 - 6
= 6
Hope it helps :)
can you answer this 2 thx
Answer:
21 is c 22 is b hope this helps
Step-by-step explanation:
Write an equation to express the translation of y = |x| left 5 units. *
Answer:A translation is a function that moves every point a constant distance in a specified direction. A vertical translation is generally given by the equation y=f(x)+b y = f ( x ) + b .
Step-by-step explanation: y=f(x)+b y = f ( x ) + b .
Paul paid $7 per hour to rent a bicycle. Wilson paid $9 per hour to rent a bicycle. If they both rent bicycles for 3 hours, how much MORE will Wilson pay?
Answer:
6
Step-by-step explanation:
The difference in cost / hour = 9 - 7
9 - 7 = 2
They both take the bikes for 3 hours.
Difference * time = 2 * 3 = 6 dollars
Wilson pays 6 dollars more.
Answer:
,$48
Step-by-step explanation:
7×3=21
9×3=27
27-21=6
PLEASE HELP I WILL GIVE BRAINLIEST AND MAX POINTS
Select the statement that describes the end behavior of the function
A. As x approaches negative infinity, the function approaches positive infinity
B. As x approaches negative infinity, the function approaches negative infinity
C. As x approaches positive infinity the function approaches negative infinity
D. As x approaches positive infinity, the function approaches 0
Answer:
C
Step-by-step explanation:
when x is negitive, y has an asitope of 0 so not a
when x is negitive, y has an asitope of 0 so not b
when x is positive, y does keep going down so c
when x is positive, y does keep going down and doesn't seem to be approching 0 so not d
(c) Mr. Young suggested contacting a travel agent to see whether they could get a lower price. The agent found a price that was 35% lower than $1879. What was the price the travel agent found? Show your work.
Answer: The travel services sector is made up of a complex web of relationships between a variety of suppliers, tourism products, destination marketing organizations, tour operators, and travel agents, among many others. Under the North American Industry Classification System (NAICS), travel services comprises businesses and functions that assist with planning and reserving components of the visitor experience (Government of Canada, 2014).
A 7% – 8% commission level is somewhat standard with host agencies working with self sufficient agencies. Independent travel agents earning 90% – 100% of the commission are usually high volume seasoned agents that require little to no support from the host agency.
(sorry if im wrong)
:(
- 5х – 3х
What do you get from these like terms?
Sammy´s fitness goal is to do 60 pull ups. She is up to 40% of her goal. How many pull ups can Sammy do?
At the end of a pizza party, 13 of a cheese pizza and 16 of a pepperoni pizza were left. Brad ate 12 of all the leftover pizza. What fractional part of a whole pizza did Brad eat?
112
16
19
14
Answer:
i think it is c or b but go with you gut feeling
Step-by-step explanation:
What’s the answers. Please and thanks
Answer:
a) 500
b) 9.6 years
Step-by-step explanation:
Population of Ilamas
a) P = 500 e ^0.035t
Find P when t = 0
Solving for P
P = 500 e ^0.035 × 0
P = 500 × e ⁰
P = 500 × 1
P = 500
The population of the Ilamas when t = 0 is 500
b ) Find t when P = 700
P = 500 e ^0.035t
700 = 500 e ^0.035t
Divide both sides by 500
700/500 = 500 e ^0.035t/500
7/5 = e ^0.035t
1.4 = e ^0.035t
Take In of both sides
In 1.4 = In (e ^0.035t)
In 1.4 = 0.035t
t = In 1.4/0.035
t = 0.3364722366/0.035
t = 9.6134924749 years
t = Approximately to the nearest tenth of a year = 9.6 years
Suppose ALI was told that relative to the other scores on a NTS test, his score was the 95th percentile i.e., his percentile score is 95. How do we interpret it?
A person bought some cosmetics from wholesale market at the rate of Rs 360 per dozen he sells it at Rs 80 a pair find the gain percent pls do it step by step
Given,
CP of cosmetics = Rs 360 per dozen
SP of a pair of cosmetics = Rs 80
To find,
The gain percent
Solution,
1 dozen = 12 items
CP of 1 cosmetic = 360/12 = Rs 30
SP of 1 cosmetic = 80/2 = Rs 40
Profit = SP-CP
= Rs 40 - Rs 30
= Rs 10
Profit percentage is given by :
[tex]\%=\dfrac{profit}{CP}\times 100\\\\=\dfrac{10}{30}\times 100\\\\=33.34\%[/tex]
So, the profit percentage is 33.34%.
a boy has 10 cookies. and his brother has 2.5 times as many. how many does the brother have
Answer:
25
Step-by-step explanation:
Find the sum of the interior
angles of a regular nonagon
(9-sided figure).
Answer:
1260°
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightGeometry
Sum of Angles: 180(n - 2)Step-by-step explanation:
Step 1: Define
Number of sides n = 9
Step 2: Find
Substitute: 180(9 - 2)Subtract: 180(7)Multiply: 1260°Uhh Ik this is a lot to answer so I’ll give as many points as I can
Answer:
Angles 3, 8, and 6 are all equal to 132 degrees.
All other angles are equal to 48 degrees.
Please help pleaseeeee
Answer:
200 pages
Step-by-step explanation:
( number of pages) ×(2/5) = 80
Number of pages = 80 ÷(2/5)
Number of pages = 200
At the beginning of the month, there were 80 ounces of peanut butter in the pantry. Now, there is 13 OF the amount less than at the beginning. How many ounces of peanut butter are in the pantry now?
A. 23•80
B. 13•80
C. 80−13
D. (1+13)•80
BRAINLIEST!!
Answer:
well for me
Step-by-step explanation:
I think it's 80-13 because it reduced by a minus 13
Roger buys a tennis racket for $75. He also buys packs of tennis balls that cost $6 per pack.
Which expression represents the amount Roger spends, in dollars, if he buys n packs of tennis balls and the racket?
6 + 750
6 - 75
75-6
75-6
Plz hurry its a very important test!!!
Answer:
Step-by-step explanation:
It's 6n+750= $, so it's A.)
