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3 years ago

A.3 1/4 B.1 3/4 C.2 1/4 D.3/3

Mathematics

2 answers:

andrew11 [14]3 years ago

6 0

Answer:

A. 3 $\frac{1}{4}$

Step-by-step explanation:

Tresset [83]3 years ago

3 0

The answer is A 3 1/4 hope that helped

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adelina 88 [10]

Answer:

The choice 4.

$6 \sqrt{2x}$

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√72x = √9×8 x = 6√2x

I hope I helped you^_^

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3 years ago

Shanti has just joined a DVD rental club. She pays a monthly membership fee of $4.95, and each DVD rental is $1.95. If Shanti's

DerKrebs [107]

X = number of DVDs

1 DVD costs $1.95 to rent
x DVDs cost 1.95x dollars to rent

tack on the membership fee of 4.95 and the total cost is 1.95x+4.95

set this equal to 42 and solve for x

1.95x+4.95 = 42
1.95x+4.95-4.95 = 42-4.95
1.95x = 37.05
1.95x/1.95 = 37.05/1.95
x = 19

So Shanti can rent 19 DVDs

6 0

4 years ago

What is the area of the circle shown? Use 3.14 for pi.

den301095 [7]

Answer:

Step-by-step explanation:

5 0

3 years ago

A news station would like to conduct an exit poll to determine the likelihood that a highly debated amendment will receive enoug

vladimir1956 [14]

Answer:

The expression is $n = (\frac{1.645*0.5}{0.03})^2$

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

What expression would give the smallest sample size that will result in a margin of error of no more than 3 percentage points?

We have to find n for which M = 0.03.

We have no prior estimate for the proportion, so we use $\pi = 0.5$ . So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}$

$0.03\sqrt{n} = 1.645*0.5$

$\sqrt{n} = \frac{1.645*0.5}{0.03}$

$(\sqrt{n})^2 = (\frac{1.645*0.5}{0.03})^2$

$n = (\frac{1.645*0.5}{0.03})^2$

The expression is $n = (\frac{1.645*0.5}{0.03})^2$

3 0

3 years ago

80 girls and boys have planned for a movie they are any ratio of 6 girls to two boys how many girls are there

inn [45]

This scenario can be expressed by the equation 6x + 2x = 80
first, add 6x and 2x because they are like terms
you are left with 8x = 80
divide both sides and we know that x = 10.
so, put 10 back into the original equation:
6(10) + 2(10) = 8
There are 60 girls and 20 boys :)

3 0

3 years ago

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