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3 years ago

I NEED HELP PLS!!!!!!!ASAP

Mathematics

1 answer:

iogann1982 [59]3 years ago

7 0

Answer:

what grade are you in so i can help

Step-by-step explanation:

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Suppose that 22inches of wire costs 88 cents.

torisob [31]

Answer:

64 cents

step by step explanation is given above.

3 0

2 years ago

In a recent survey in a Statistics class, it was determined that only 70% of the students attend class on Fridays. From past dat

pishuonlain [190]

Answer:

a) 67.6% of students is expected to pass the course

b) 0.9112 = 91.12% probability that he/she attended classes on Fridays

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

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

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

a. What percentage of students is expected to pass the course?

88% of 70%(attended class)

20% of 100 - 70 = 30%(did not attend class). So

$p = 0.88*0.7 + 0.2*0.3 = 0.676$

0.676*100% = 67.6%

67.6% of students is expected to pass the course.

b. Given that a person passes the course, what is the probability that he/she attended classes on Fridays?

Here, we use conditional probability:

Event A: Passed the course

Event B: Attended classes on Fridays.

67.6% of students is expected to pass the course.

This means that $P(A) = 0.676$

Probability that passed and attended classes on Friday.

88% of 70%

This means that:

$P(A \cap B) = 0.88*0.7 = 0.616$

Then

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.616}{0.676} = 0.9112$

0.9112 = 91.12% probability that he/she attended classes on Fridays

5 0

3 years ago

The triangles are similar. what is the value

klemol [59]

X=16 because the the small triangle you just multiply the big triangle by 4

8 0

3 years ago

I’ve worked out that the 1st term is -5 but can’t work out the rest. I thought it was -77 but it’s wrong

Pie

Answer:
1st term: 3(1) - 8 = 3-8= -5
10th term: 3(10) - 8= 30-8= 22
100th term: 3(100)-8= 300-8= 292

Explanation:
Substitute the term number (e.g. 10) in the place of n

Hope this helped! :)

7 0

2 years ago

Read 2 more answers

Ralph sold brownies for ?$0.27 a piece in order to earn money to buy baseball cards. If the cards cost ?$0.81 per? pack, and if

ira [324]

<h2>Greetings!</h2>

Answer:

3 brownies

Step-by-step explanation:

To find this answer we need to divide the 0.81 by 0.27 to find out how many brownies total 0.81:

0.81 ÷ 0.27 = 3

So he needs to sell 3 brownies.

<h2>Hope this helps!</h2>

3 0

3 years ago