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3 years ago

I will give brainiest to whoever answers correctly !!

Mathematics

2 answers:

Naily [24]3 years ago

6 0

470 was sold in 2011 and 429 in 2012. So there was a decrease of (470-429) = 41.

To find the percentage decrease, we take the decrease and we divide by the original number and multiply by 100.

Decrease = 41
Original number = 470
% decrease = (41/470)*100 = 8.72%

Georgia [21]3 years ago

3 0

Answer:

I don’t know the answer I just need some points to ask more questions !!! have a good day !!

Step-by-step explanation:

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In answering on a multiple choice test, a student either know the answer or guesses. Let p be the probability that the students

LenaWriter [7]

Answer:

$P(A_{1}|B ) =\frac{mp}{1+p(m-1)}$

Step-by-step explanation:

For mutually exclusive events as A1, A2, A3, etc, Bayes' theorem states:

$P(A|B)= \frac{P(B|A)P(A)}{P(B)}$

P(A|B) is a conditional probability: the likelihood of event A occurring given that B is true.

P(B|A) is a conditional probability: the likelihood of event B occurring given that A is true.

P(A) is the probability that A occurs

P(B) is the probability that B occurs

For this problem:

A1 is the probability that the student knows the answer

A2 is the probability that the student guesses the answer

B is the probability that the student answer correctly

$P(A_{1})=p \\P(A_{2})=1-p \\P(B|A_{1})=1 \\P(B|A_{2})=\frac{1}{m} \\P(B)= P(A_{1})P(B|A_{1}) + P(A_{2})P(B|A_{2})= p+\frac{1-p}{m} \\$

P(B|A₁) means the probability that the answer is correct when he knew the answer

P(B|A₂) means the probability that the answer is correct when he guessed the answer

P(A₁|B) means the probability that he knew the answer when the answer was correct

Replacing everything in the Bayes' theorem you get:

$P(A_{1}|B)= \frac{P(B|A_{1})P(A_{1})}{P(B)}=\frac{(1)(p)}{p+\frac{1-p}{m}} =\frac{mp}{mp+1-p} =\frac{mp}{1+p(m-1)}$

5 0

3 years ago

Name the consecutive (same side) exterior angles and interior angles

konstantin123 [22]

Answer:

<u> Consecutive Interior Angles </u>

Consecutive interior angles equal 180 degrees and they are the ones in between(inside) the parallel lines, so that means that these angles..

∠2+∠9= 180

∠4+∠11= 180

∠6+∠13= 180

∠8+∠15= 180

<u> Consecutive Exterior Angles </u>

Consecutive exterior angles also equal 180 degrees, but they are on the outside of the parallel lines. They are...

∠1+∠10= 180

∠3+∠12= 180

∠5+∠14= 180

∠7+∠16= 180

3 0

3 years ago

Please help with math

klasskru [66]

Answer:

Step-by-step explanation:

The other graphs are functions.

Graph A is a linear function, and C is an Absolute Value Function.

Graph B also seems to be a function.

However- I can only narrow it down to B or C. I apologize if my answer is not correct.

6 0

3 years ago

Miss siegel’s class has 18 girls and 12 boys. What is the ratio of girls to boys?

alexgriva [62]

Answer:

3:2

Step-by-step explanation:

girls: boys

18 : 12

Divide each side by 6

18/6 : 12/6

3 : 2

4 0

3 years ago

Read 2 more answers

Needdddd help pls ill mark brainlist

Ilya [14]

Step-by-step explanation:

correct answer 2) y> 3x+2

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3 years ago