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1 year ago

Need heeeelp please

Mathematics

2 answers:

cestrela7 [59]1 year ago

8 0

Answer:

9*a^10*(1/(b^6))

Step-by-step explanation:

(-3a^5*b^-3)^2

(-3)^2 * (a^5)^2 * (b^-3)^2

9a^10*b^-6

9*a^10*(1/(b^6))

egoroff_w [7]1 year ago

4 0

Answer:9 $a^{10}$ $b^{-6}$ = $\frac{9a^{10} }{b^6}$

Step-by-step explanation:

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A person buys 32 one-liter bottles of soda bottles for a large company party. The store clerk offers cardboard carrying cases fo

ZanzabumX [31]

4 cases. If you have 4 cases that hold 8 bottles in total they would hold 32 bottles. 32/8=4 4x8=32

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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 6 questions correctly. If a student

Mademuasel [1]

Answer:

37.70% probability that the student will pass the test

Step-by-step explanation:

For each question, there are only two possible outcomes. Either the student guesses it correctly, or he does not. The probability of a student guessing a question correctly is independent of other questions. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

10 true/false questions.

10 questions, so $n = 10$

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If a student guesses on each question, what is the probability that the student will pass the test?

$P(X \geq 6) = P(X = 6) + P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10)$

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 6) = C_{10,6}.(0.5)^{6}.(0.5)^{4} = 0.2051$

$P(X = 7) = C_{10,7}.(0.5)^{7}.(0.5)^{3} = 0.1172$

$P(X = 8) = C_{10,8}.(0.5)^{8}.(0.5)^{2} = 0.0439$

$P(X = 9) = C_{10,9}.(0.5)^{9}.(0.5)^{1} = 0.0098$

$P(X = 10) = C_{10,10}.(0.5)^{10}.(0.5)^{0} = 0.0010$

$P(X \geq 6) = P(X = 6) + P(X = 7) + P(X = 8) + P(X = 9) + P(X = 10) = 0.2051 + 0.1172 + 0.0439 + 0.0098 + 0.0010 = 0.3770$

37.70% probability that the student will pass the test

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3 years ago

Which one of the fractions is the smallest? A) 1/2 B) 3/20 C) 3/8 pls help

marshall27 [118]

3/20

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3/8 is the second largest
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3 years ago

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Tju [1.3M]

Answer:

$\large\boxed{144^\frac{3}{2}=1728}$

Step-by-step explanation:

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3 years ago

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andrezito [222]

Answer:

Step-by-step explanation:

When dealing with an equation that only involves addition and subtraction ...you can solve it juat as it is witout using any special method same applied to equations tht involve only multiplication and division ... because they are an (inverse) of each other... hope it helps

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2 years ago

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Need heeeelp please ​

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