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3 years ago

Equivalent expression of 9y-3

Mathematics

2 answers:

valentina_108 [34]3 years ago

7 0

Answer:

An option: 18y - 6

Step-by-step explanation:

Can you give options?

For now, I'll provide with these:

18y - 6=

(Divide both sides by 2)

9y - 3

frutty [35]3 years ago

3 0

Answer:

3 ( 3y - 1 )

Step-by-step explanation:

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How do you write 3/4 as percentage?

german

3/4 is 75%

for this think of them as quarters 4 quarters is 100 %, 2 quarters is 50% so 3 quarters would be 75%

or you could just do 3 divided by 4 then times that by 100

5 0

3 years ago

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In a study, 43% of adults questioned reported that their health was excellent. A researcher wishes to study the health of people

marishachu [46]

Answer:

13.44% probabilith that at most 3 are in excellent health.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they are in excellent health, or they are not. The probability of an adult being in excellent health is independent of other adults. 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.

43% of adults questioned reported that their health was excellent.

This means that $p = 0.43$

13 adults randomly selected

This means that $n = 13$

Find the probability that when 13 adults are randomly selected, at most 3 are in excellent health.

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)$

In which:

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

$P(X = 0) = C_{13,0}.(0.42)^{0}.(0.58)^{13} = 0.0008$

$P(X = 1) = C_{13,1}.(0.42)^{1}.(0.58)^{12} = 0.0079$

$P(X = 2) = C_{13,2}.(0.42)^{2}.(0.58)^{11} = 0.0344$

$P(X = 3) = C_{13,3}.(0.42)^{3}.(0.58)^{10} = 0.0913$

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.0008 + 0.0079 + 0.0344 + 0.0913 = 0.1344$

13.44% probabilith that at most 3 are in excellent health.

6 0

3 years ago

You all smell here’s some points

Lina20 [59]

Answer:

32.852

Step-by-step explanation:

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Find the 81st term of the arithmetic sequence -10, -25, -40

erik [133]

Answer:

5 - (N x 15)

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5-1215=-1210

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Step-by-step explanation:

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ser-zykov [4K]

The Area of a Trapezoid can be calculated as:

Area = 0.5 x Height x Sum of lengths of parallel sides

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Area = 0.5 x 12.6 x (19 + 29.2) = 303.66 square inches

So, the correct answer is option C

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3 years ago

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