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2 years ago

Marco bought $30 worth of football cards. If he bought 12 packs of cards, how much does each pack of cards cost?

Mathematics

2 answers:

Mandarinka [93]2 years ago

7 0

Answer:

2.5

Step-by-step explanation:

30/12=2.5

Natasha2012 [34]2 years ago

4 0

Answer:

$2.50 each

Step-by-step explanation:

30/12 = 2.5 = $2.50 each

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What is a quadrilateral with opposite sides that are parallel,4 sides that are the same length,and no right angles?

STALIN [3.7K]

The shape you describe is a rhombus.

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3 years ago

What is the equation of a line with a slope of 3 and contains<br> point (4.1)

cricket20 [7]

Answer:

y = 3x - 11

Step-by-step explanation:

y=mx+b

1=3(4)+b

1=12+b

b=-11

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3 years ago

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17. El precio de los terrenos en Lima es proporcional al área e inversamente proporcional a su distancia con respecto al centro

grin007 [14]

Answer:

375000

Step-by-step explanation:

We have that in this case the following proportion would be fulfilled:

Price * Distance / area

Now, we have that for a distance of 45 km and an area of 900 m ^ 2 the price is 250,000, now for a distance of 40 km but with an area of 1,200 m ^ 2, how would the price be, we replace:

250000 * 45/900 = P * 40/1200

12500 * 1200/40 = P

P = 375000

Which means that for these conditions the price is 375000.

3 0

3 years ago

第 5 个问题 a multiple choice exam has 10 questions. each question has 3 possible answers, of which one is correct. a student knows

tatuchka [14]

The chances that the student was merely guessing is 1/3.

Bayes Theorem determines the conditional probability of an event A given that event B has already occurred.

denoted by

$P(A/B)=\frac{P(A)*P(B/A)}{P(B)}$

let A be the event that the student knows the answer .

B be the event that the student does not knows the answer .

and

E be the event he gets answer correct .

According to the given question

$P(A)=\frac{4}{10} \\\\ P(B)=1-\frac{4}{10} =\frac{6}{10}$

Probability that the answer is correct ,given that he knows the answer is

$P(E/A)=1$

Probability that the answer is correct ,given that he guesses it is

$P(E/B)=\frac{1}{3}$ [as the MCQ has 3 options and only one is correct]

We need to find the probability that he guesses the answer given that it is correct.

Required probability $P(B/E)=\frac{P(B)*P(E/B)}{P(A)*P(E/A)+P(B)*P(E/B)}$

Substituting the values we get

$P(B/E)=\frac{\frac{6}{10} *\frac{1}{3} }{\frac{4}{10} *1+\frac{6}{10} *\frac{1}{3} }$

$=\frac{6}{30}*\frac{30}{18} \\ \\ =\frac{6}{18} \\ \\ =\frac{1}{3}$

Therefore , the chances that the student was merely guessing is 1/3.

Learn more about Probability here brainly.com/question/13140147

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8 0

1 year ago

Find the value of 9u-2 given that -7u-7=7 ?

Yuliya22 [10]

Answer:

-20

Step-by-step explanation:

when you solve: -7u-7=7, you get u= -2 and when you plug it in you get this equation 9(-2)-2=?

then you get -20

4 0

2 years ago

Read 2 more answers