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3 years ago

12

Help please it’s important!!

1 answer:

bixtya [17]3 years ago

5 0

2

Here is the explanation: 2 (17x+2)

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Seven less than the product of 5 and a number is 2

slava [35]

5x-7=2

hope this makes sense

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3 years ago

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What is the measure of angle B?

Natalka [10]

Answer:

55 ° is correct answer option (c)

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3 years ago

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A test consists of 10 true/false questions. To pass the test a student must answer at least 88 questions correctly. If a student

Zanzabum

Answer:

The probability that the student is going to pass the test is 0.0545

Step-by-step explanation:

The variable that says the number of correct questions follows a Binomial distribution, because there are n identical and independent events with a probability p of success and a probability 1-p of fail. So, the probability of get x questions correct is:

$P(x)=\frac{n!}{x!(n-x)!} *p^{x} *(1-p)^{n-x}$

Where n is equal to 10 questions and p is the probability of get a correct answers, so p is equal to 1/2

Then, if the student pass the test with at least 8 questions correct, the probability P of that is:

P = P(8) + P(9) + P(10)

$P=(\frac{10!}{8!(10-8)!}*0.5^{8}*(0.5)^{10-8})+(\frac{10!}{9!(10-9)!} *0.5^{9} *(0.5)^{10-9})+(\frac{10!}{10!(10-10)!} *0.5^{10} *(0.5)^{10-10})$

P = 0.0439 + 0.0097 + 0.0009

P = 0.0545

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3 years ago

1.4hrs to run 10.85 average speed in mph

Colt1911 [192]

10.85 miles / 1.4 hrs = 7.74 miles per hour

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3 years ago

victor borrowed $21.50 from his mother to go to the theater.A week later he paid her $21.50 back. how do he still owe her?

Tresset [83]

He owns his mother $0; Because $21.50 - $21.50 is Zero

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4 years ago