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3 years ago

Evaluater 3/7+ 5/8s when r =14s =8.

Mathematics

1 answer:

adell [148]3 years ago

3 0

Answer:

Step-by-step explanation:

Alright, lets get started.

The given expression as :

$\frac{3}{7}r + \frac{5}{8}s$

r is given as 14 and s is given as 8

Plugging the value of r and s in given expression.

$\frac{3}{7}(14) + \frac{5}{8}(8)$

$3*2 + 5$

$6+5$

$11$

Hence the answer is 11 : Answer

Hope it will help :)

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mrs marvel bought some t-shirts. she gave 1/2 of them to coach nine, 2 of them to mrs. lewis and kept 5 to herself. how many t-s

vesna_86 [32]

Answer:

Step-by-step explanation:

assuming that the shirts in the question are the only shirts bought, 2+5 is 7, and the other half would also be 7, making it 14

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3 years ago

If a car travels 55 miles per hour how far will it travel in half an hour

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27.5

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3 years ago

Problem: Report Error Two parallel chords in a circle have lengths 10 and 14, and the distance between them is 6. The chord para

charle [14.2K]

The value of $\sqrt{a} = 2\sqrt{46}$ and a = 184

We let O be the centre, A₁ A A₂ , B₁ B B₂ represent the chords with length 10, 14 respectively.

Connecting the endpoints of the chords with the centre, we have several right triangles. However, we do not know whether the two chords are on the same side or different sides of the centre of the circle.

By the Pythagorean Theorem on Δ OBB₁,

we get x^2 + 7^2 = r^2

⇒ x = $\sqrt{r^{2} - 49 }$ , where x is the length of the other leg. Now the length of the leg of Δ OAA₁ is either 6 + x or 6 - x depending whether or not A₁A₂, B₁B₂ are on the same side of the center of the circle:

$(6$ ± $\sqrt{r^{2} - 49 }$ ) + 5² = r²

12 ± $12 \sqrt{r^{2} - 49}$ = 0

Only the negative works here (thus the two chords are on opposite sides of the center), and solving we get x=1, r = $5\sqrt{2}$ . The leg formed in the right triangle with the third chord is 3 - x = 2, and by the Pythagorean Theorem again,

$(\frac{a}{2} )^{2} + 2^{2} = (5\sqrt{2} )^{2} \\$

⇒ $\sqrt{a} = 2\sqrt{46}$

a = 184

To learn more about Pythagoras theorem from the given link

brainly.com/question/343682

#SPJ4

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1 year ago

a researcher wishes to estimate the proportion of adults who have high speed internet access. what size sample should be obtaine

blagie [28]

Answer:

421

Step-by-step explanation:

Margin of error = E = 0.04

Confidence Level = 90%

z value associated with this confidence level = z = 1.645

Previous estimate of population proportion = p = 0.54

q = 1 - p = 1 - 0.54 = 0.46

The formula of Margin of Error for population proportion is:

$E=z\sqrt{\frac{pq}{n}}$

Here, n is the sample size.

Re-arranging the equation for n and using the values we get:

$n=(\frac{z}{E})^{2} \times pq\\\\ n = (\frac{1.645}{0.04})^{2} \times 0.54 \times 0.46\\\\ n = 421$

Thus the minimum sample size required to estimate the proportion of adults who have high speed internet access is 421

7 0

3 years ago

There are eight boxes. Each box holds one sweater. There are 3 blue, 2 brown, 1 green, and 2 red sweaters. What is the probabili

Reil [10]

3 + 2 + 1 + 2 = 8, which is the amount of sweaters.
The probability of a brown sweater is 2 / 8 = 0.25
And the probability of a green sweater is 1 / 8 = 0.125.

Multiply the two probabilities together to get the probability of choosing brown then green:
0.25 * 0.125 = 0.03125.

To convert a decimal to fraction, you multiply the numerator and denominator, or in this case $\frac{0.03125}{1}$ by 1000 which gets $\frac{31.25}{1000}$

Which can be simplified to:
$\frac{1}{32}$ .

Hope this helps.

8 0

3 years ago

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