Suppose you run a bookstore, and have ratings (1 to 5 stars) of books. Your collaborative filtering algorithm has learned a parameter vector for user j, and a feature vector for each book. You would like to compute the "training error", meaning the average squared error of your system’s predictions on all the ratings that you have gotten from your users. Which of these are correct ways of doing so (check all that apply)For this problem, let m be the total number of ratings you
have gotten from your users. (Another way of saying this is
that m=∑nmi=1∑nuj=1r(i,j)). [Hint: Two of the four options below are correct.]
a) 1m∑(i,j):r(i,j)=1((θ(j))Tx(i)−r(i,j))2
b) 1m∑nmi=1∑j:r(i,j)=1(∑nk=1(θ(j))kx(i)k−y(i,j))2
c) 1m∑(i,j):r(i,j)=1((θ(j))Tx(i)−y(i,j))2
d) 1m∑nuj=1∑i:r(i,j)=1(∑nk=1(θ(k))jx(k)i−y(i,j))2

Answers

Answer 1
D because I’m forced to answer this question

Related Questions

What equation has w=8 as the solution

Answers

Answer:

3w+7=31

Step-by-step explanation:

Subtract 7 on both sides

3w+7=31

     -7   -7

Divide by 3 on both sides

3w=24

/3    /3

w=8

Hopefully, this helps! :)

Which expression is equivalent to the expression below? 1/2 * x - 1

Answers

Answer:

2 * x - 2

Step-by-step explanation:

If you double something on one side, you have to do it on the other side

So you can do this for any problem, and it will be equivalent to the original expression :D

At an arcade, Michael pays $0.50 for each game he plays. proportional or non-proportional?

Answers

Answer:

proportional

Step-by-step explanation:

because for each game played, he pays $0.50, meaning equation is 0.50x. That is a proportional equation. The change is constant, at 0.50

please hit the heart button :)

Answer:

That would be proportional

Step-by-step explanation:

If each game is 50 cents then yes it would be proportional

If each thing is worth the same it’s proportional but if not then its not proportional

for example

1 game 50 cents

2 game 1 dollar (becuase 0.5+0.5 is 1)

3 games 1.50

ts proportional

IS THIS RIGHT PLSS HELPPP

Answers

Answer:

yes

Step-by-step explanation:

Clare is in charge of getting snacks for a road trip with her friends and her dog. She has
$35 to go to the store to get some supplies. The snacks for herself and her friends cost
$3.25 each, and her dog's snacks costs $9 each.

Answers

Answer:

$15 and 50 cents

Step-by-step explanation:

3.25x2=6.50+9=15.50

What is the answer?????

Answers

Answer:

0.25

Step-by-step explanation:

1. Neena is listening to a song. It has a consistent beat. She counts 11 beats in 5 seconds. What is the constant of proportionality for the relationship of beats to minutes?

Answers

Answer:

132

Step-by-step explanation:

132

Step-by-step explanation:

First, find how many beats are in a minute by creating a proportion:

\frac{11}{5} = \frac{x}{60}

Cross multiply and solve for x:

5x = 660

x = 132

So, there are 132 beats in one minute.

This means the constant of proportionality is 132.

Answer:

132

Step-by-step explanation:

if there are 7282 male students at georgia institute of technology, how much females are there?

Answers

Answer:

2974

Step-by-step explanation:

female/male = 29/71

female =male*29/71 =7282*29/71= 2974.33 =2974

I need help with this problem.

Answers

A and 0 both equals 45 degrees
It’s 45 ............

ON A COMPUTER SCREEN ANSWER ASAP
Point M is drawn as the midpoint of BC.
Which of the following could be used as part of the proof that B2C? Select three that apply.
AB AC because of the definition of an isosceles triangle
BAC because corresponding parts of congruent triangles are congruent.
AABM 4 AACM because of the SAS triangle congruence criterion
BMCM because of the definition of a midpoint
AM A AM because of the Symmetric Property

Answers

Answer:

A. AB = AC because of the definition of an isosceles triangle

B. ∠B = ∠C because corresponding parts of congruent triangles are congruent.

D. BM = CM because of the definition of a midpoint

Step-by-step explanation:

A. An isosceles triangle is a triangle with two equal sides, hence:

AB = AC because of the definition of an isosceles triangle. option A is correct.

D. Since Point M is drawn as the midpoint of BC, hence:

BM = CM because of the definition of a midpoint. Option D is correct.

E. Reflexive property of congruence states that an angle, line segment, or shape is always congruent to itself. hence AM ≈ AM because of reflexive property.

AM ≈ AM because of the Symmetric Property is wrong. Option E is wrong.

C) The side - side - side (SSS) triangle congruence theorem states that if all the sides of two triangles are equal, then they are congruent triangles.

Since BM = CM, AM = AM and AB = AC, hence ΔABM = ΔACM because of the SSS triangle congruence criterion

ΔABM = ΔACM because of the SAS triangle congruence criterion is wrong. Option C is wrong.

D. Corresponding parts of congruent triangles are congruent. hence:

∠B = ∠C because corresponding parts of congruent triangles are congruent. Option B is correct

Which equation has the solutions x=1+/- 5?
Ox^2+2x + 4 =0
Ox^2-2x + 4 =0
Ox^2+ 2x-4 = 0
Ox^2-2x – 4 =0

Answers

Answer:

[tex]x^{2} -2x-4=0[/tex]

Solving Steps

Use the quadratic formula

[tex]x=\frac{-(-2)(+/-)\sqrt{(-2)^2-4*1*(-4)} }{2*1}[/tex]

Multiply / Remove the parentheses / Evaluate

[tex]x=\frac{2(+/-)\sqrt{4+16} }{2}[/tex]

Calculate

[tex]x=\frac{2(+/-)\sqrt{20} }{2}[/tex]

Separate the solutions

[tex]x=\frac{2(+/-)2\sqrt{5} }{2} \\x=\frac{2-2\sqrt{5} }2}[/tex]

Simplify

[tex]x=1+\sqrt{5} \\x=1-\sqrt{5}[/tex]

I need help on this question

Answers

Answer:

Mexico

Step-by-step explanation:

It’s in Spanish

HELPP PLSSS!! I NEED HELPL

Answers

Answer:

65% :) enjoy your day!

Step-by-step explanation:

please mark brainliest

1 Austin earned 47 out of 50 points on his math test. Marty earned a 92% on his math test. Who earned a higher score? Marty or Austin​

Answers

Answer:

Austin earned a higher score

Step-by-step explanation:

47/50 (Austin's score) = 94/100 (denominator is now 100) = 94% (converted to percentage) > 92% (Marty's score)

Hope this helps!

Answer:

Austin earned a higher score.

Step-by-step explanation:

Marty 50 * 0.92 = 46 points

Naomi has a lot of stuff in her pencil case. There are 18 items in her pencil case, including 9 pencils. What is the probability that a randomly selected item from Naomi's pencil case will be a pencil? Write your answer as a fraction or whole number. P(pencil) =​

Answers

Answer:

p=1/2

Step-by-step explanation:

If 9 is 1 half of 18 that means there is a 50% chance of you picking a pencil out of the pencil case

Naomi has a lot of stuff in her pencil case. There are 18 items in her pencil case, including 9 pencils. What is the probability that a randomly selected item from Naomi's pencil case will be a pencil? Write your answer as a fraction or whole number. P(pencil) =


Answer : p= 1/2

Please answer quickly will mark brainliest!

Answers

Answer:

find a common denominator

Step-by-step explanation:

please answer I will mark as brainliest​

Answers

Answer:

[tex]3)\ and\ 4)[/tex]

Step-by-step explanation:

[tex]We\ are\ given\ that,\\A\ is\ the\ set\ of\ squares.\\x\ belongs\ to\ the\ Set\ A\\y\ belongs\ to\ the\ Set\ A,\ too.\\Hence,\\Lets\ consider\ that\ \sqrt{x} =a, \sqrt{y}=b\\Hence,\\a^2=x, b^2=y\\Before\ proceeding\ we\ may\ use\ the\ following\ Laws\ Of\ Exponents:\\* For\ any\ two\ real\ numbers,\ m\ and\ n, m^a*n^a=(mn)^a\\* For\ any\ two\ real\ numbers,\ m\ and\ n, \frac{m^a}{n^a}=[\frac{m}{n}]^a\\[/tex]

[tex]Now,\\When\ we\ intend\ to\ multiply\ x\ and\ y,\\x*y=a^2*b^2\\xy=a^2*b^2\\xy=(ab)^2\\As\ the\ new\ term\ xy\ is\ the\ square\ of\ product\ of\ a\ and\ b\,\ it\\ is\ a\ square\ too.\ Hence,\ it\ belongs\ in\ the\ set\ of\ squares(A).\\Similarly,\\When\ we\ intend\ to\ divide\ x\ by\ y,\\\frac{x}{y} =\frac{a^2}{b^2}\\Hence,\\\frac{x}{y} =[\frac{a}{b}]^2\\As\ the\ new\ term\ \frac{x}{y}\ is\ the\ square\ of\ the\ quotient\ of\ a\ and\ b\ i.e\ \frac{a}{b}, the\ term\\ \frac{x}{y}\ too\ belongs\ toA[/tex]

[tex]Why\ not\ 1)\ and\ 2)?\\Because\ by\ just\ adding/subtracting\ x\ and\ y:\\x+y=a^2+b^2\\x-y=a^2-b^2\\It\ doesnt\ really\ prove\ that\ their\ sum\ say\ c\ is\ a\ perfect\ square.(except\\ in\ the\ case\ of\ Pythagorean\ Triplets [Ex. 3,4,5\ or\ 6,8,10]. Hence, As\\ not\ all\ numbers\ form\ integral\ pythagorean\ triplets,\\ (x+y)\ and\ (x-y)\ are\ not\ always\ perfect\ squares\ and\ hence,\\ dont\ belong\ to\ Set\ A.[/tex]

[tex]This\ gives\ Options\ 3)\ and\ 4)\ as\ the\ right\ answer.[/tex]

what
is
balanced
diet
?
Why
should
we
take
balanced
What
are
the
functions
of
protein
?
Write
its
sources
,
Name
two
food
items
that
make
us
fat
(
obese
)
if
taken
in
exc
and regularly
Name two protective food product,
List the importance of water in our diet.
How can we preserve our foods?
Why should we not over cook our food?
Make a list of nutrients with three sources of each,
Watch the following
again
Proteins
bones and teeth
body building food
Fats​

Answers

Answer:

A balanced diet is when we eat different groups of food in right proportion and in sufficient quantity to maintain a healthy life

The function of proteins :supply the amino acids necessary to synthesize new proteins needed for metabolism,growth and repair

The population of a city decreases by 4% per year. If this year's population is 231,000, what will next year's population be, to the nearest individual?​

Answers

Answer:

221,760

Step-by-step explanation:

1. multiply 231,000 by 4

2. divide the answer by 100

3. subtract that answer from 231,000

4. This is the answer to the question

Isosceles trapezoid ABCD has legs AB and CD, and base BC If.AB = 6 -7, BC = 2y - 4, and CD=7y - 20 find
the value of y.

Answers

Answer:

y = 13

Step-by-step explanation:

y = 13

Solve for points....

Answers

Answer:

Step-by-step explanation:

For Mr Rowley,

Ratio of Number of home works to the number of exit tickets = [tex]\frac{12}{14}[/tex]

                                                                                                      = [tex]\frac{6}{7}[/tex]

                                                                                                      = 6:7

For Ms Rivera,

Ratio of Number of home works to the number of exit tickets = [tex]\frac{36}{42}[/tex]

                                                                                                      = [tex]\frac{6}{7}[/tex]

                                                                                                      = 6:7

Since, both the ratios are same, fractions will be proportional.

[tex]\frac{12}{14}=\frac{36}{42}[/tex]


Students set up the experiment shown in their Biology class. After 24 hours, students noticed gas had accumulated in one of the inverted test tubes.
They measured the amount of gas.
What would be a best explanation for the gas accumulated in one of the inverted test tubes?

Answers

Answer: Light caused the eludes plants to photosynthesize, releasing O2 gas

Students replicated the experiment carried out in biology class, and after observing for 24 hours that gas had accumulated in one of the inverted test tubes, it is by light caused to elodea plant to photosynthesize and release oxygen, hence option D is correct.

What is the photosynthesis experiment?

There are numerous studies that show photosynthesis in action. For instance, when an elodea plant is exposed to sunlight, gases are emitted, collected in a tube, and tested to see if they contain oxygen.

This shows that the plant creates oxygen and glucose when exposed to sunlight.

Therefore students replicated the experiment carried out in biology class, and by the plant during the process of photosynthesis, hence option D is correct.

Learn more about photosynthesis, here:

https://brainly.com/question/30033973

#SPJ5

Select the correct answer from the drop-down menu.
N
56°
56°
34
M
Р
20

Answers

Answer:

the amswer is b hope this helps

The school band is ordering health bars to sell for a tundraiser The company that sells the bars charges $0.40 per bar
plus $20.00 for shipping regardless of the size of the order. The band must spend less than $200.00 on bars for the
tundraiser The inequality below relates x the number of bars that could be ordered, with the shipping costs and their
spendingg requirements
040x+20 <200
Which best describes the number of bars the band can order?
O They can onder from 0 to 449 bars but no more
O They can order trom 0 to 450 bars but no more
O Their order must contain 451 bars or more
O Their order must contain 452 bars or more

Answers

Answer:

A

Step-by-step explanation:

Answer:

A: They can order from 0 to 449 bars, but no more.

Step-by-step explanation:

the other guy deserves more likes

Directions (0.13 to 0.16): Find the odd one out.
13.
(1) Gujarat
(2) Maharashtra
(3) Uttar Pradesh
(4) West Bengal​

Answers

Answer:

[tex]uttar \: pradesh[/tex]

Step-by-step explanation:

[tex]because \: all \: except \: uttar \: pradesh \\ \: have \: sea \: coast \\ \: \\need \: brainliest \: and \: thankss...[/tex]

if 126 base n is equal to 86 find the positive value of n​

If 126n = 86, find a positive value for n

Answers

Answer:

0.68?

Step-by-step explanation:

I am not from English speaking country so I am not sure about the first sentence but the second

126n = 86 | /126

n = 86/126

n ≈ 0,68

Madea hires a caterer to provide food for her birthday. The caterer charges
her $225 for food and supplies and $25 per hour to serve during the party.
Madea ends up paying $350 total. How many hours did the caterer serve?
Use the equation 25x+225=350 to solve.

Answers

Answer:

The caterer served 5 hours. x = 5

Step-by-step explanation:

25x + 225 = 350

We must use inverse operations to get x

25x + 225 - 225 = 350 - 225

25x = 125

25x ÷ 25 = 125 ÷ 25

x = 5

the caterer served 5 hours.

I hope this helped and if it did I would appreciate it if you marked me Brainliest. thank you and have a nice day!

1. What's the fraction 18/24 reduced to its lowest terms?
A. 12
B.24 18
C.34
D. 1824

Answers

Answer:

answer is 3 upon 4

Step-by-step explanation:

because if we reduce 18/24 to its lowest term so first we have to reduce 18 to and then 24 --- 18 is factor of 9x2 and 24 is factor of 12x2 then we have to cut 2 in both and there is answer 9 upon 12 still it is reducing so 3x3 is 9 and 3x4 is 12 so now we have to cut 3 in both the answer is 3 upon 4

Write [ (-4)×(-5)]^5 as a product of powers.
A.(-4)^5+(-5)^5=
b. 4^5×5=
c. (-4)^5×(-5)^5=
d.5(-4)+5(-5)=​

Answers

Answer:

c

Step-by-step explanation:

I took the test and got a 4/5

Answer:

(-4)^5x(-5)^5=

Step-by-step explanation:

How is your day? I hope you had a great one!

Answers

Answer:

great!

Step-by-step explanation:

how about you?

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Taijin kyofusho differs from social anxiety disorder in that Select one: a. it is a psychotic condition, whereas social anxiety disorder is a neurotic condition. b. social anxiety disorder is only found in the West, and taijin kyofusho is only found in East Asia. c. it involves some imagined physical symptoms that social anxiety disorder does not. d. it is a more debilitating condition than social anxiety disorder. 1. What are viruses made up of? of the 8 friends sitting around the table at lunch, 6 brought their lunch from home. Whichgrid represents the percent of the friends who brought their lunch from home? Bryson Corporation purchased a limited-life intangible asset for $1,162,500 on May 1, 2018. It has a remaining useful life of 15 years. What total amount of amortization expense should have been recorded on the intangible asset by December 31, 2020 (if necessary, round your answer to the nearest dollar) Omg I dont get it look at the picture:( describe the characteristics of a spartan lifestyle. help i will gibe brainleist pls help with this problem. rebecca smith was the top scorer in a womens professional basketball league There are 4 birds and 6 snakes. What is the ratio of birds to snakes? This one is for question #7 what is a baby cat called? what is something that can be dissolve in a solution called? 100 POINTS!!! APWH EDGE2020!!! I WILL REPORT INAPPLICABLE ANSWERS!!!!Refer to the passage. One can hardly believe there has been a revolution in all history so rapid, so extensive, so complete. Through it the face of the earth is making over, even as to its physical forms; political boundaries are wiped out and moved about, as if they were indeed only lines on a paper map; population is hurriedly gathered into cities from the ends of the earth; habits of living are altered with startling abruptness an thoroughness; the search for the truths of nature is infinitely stimulated and facilitated and their application to life made not only practicable, but commercially necessary. Even our moral and religious ideas and interests, the most conservative because the deepest-lying things in our nature, are profoundly affected. That this revolution should not affect education in other than formal and superficial fashion is inconceivable. Back of the factory system lies the household and neighborhood system. Those of us are here today need to go back only one, two, or at most three generation, to find a time when the household was practically the center in which were carried on, or about which were clustered, all the typical forms of industrial occupation. Excerpt from The School and Society, written by social reformer John Dewey in 1900 The passage implies that the Industrial Revolution had which of the following effects on the social norms of working-class households? Socialist sympathies undemined the strictures of partiarchy. Factories supplanted the home as the central locus of family life. Progressive values decentralized conventional family structures. Traditional feudal systems reinforced the rise of the nuclear family. Describe and correct the error a student made when graphing the linear equation y=34x6. NEED ASAPBetween 1787 and 1789, a major controversy between the Federalists and the Anti-Federalists focused primarily on_____expansion of slavery into the territories.the wisdom of creating a two-house legislature.division of power among different levels of government.the issue of ratification of the new U.S. Constitution. Alexandra is dragging her 37.8 kg golden retriever cross the wooden floor by applying a horizontal force. What force must be applied to move a dog with a constant speed of 1 m/s? The coefficient of kinetic friction between the dog in the floor is one point Please help! We the People of the United States, in order to form a more perfect union, establish justice, ensure domestic tranquility, provide for the common defence, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish the Constitution for the United States of America.Who is taking action?What are they doing?The Preamble lists six reasons why the people want to form a new type of government. Fill in the chart with the words from the Preamble and then explain what they mean in your own words (you can use the Internet to help; but be sure to use your own words here) in the second column. The first one has been completed for you.Goals or purposes ExplainForm a more perfect union Set up a stronger government with states more closely united relation between atomic number and frequency of radiation what type of process occurs at constant pressure