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3 years ago

Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Mathematics

1 answer:

ivanzaharov [21]3 years ago

7 0

14. 32 out of the 125 people surveyed preferred Company B. If the same proportion holds for the larger sample, we expect

... (32/125)×750 = 192 . . . . people would prefer Company B

15. There are a total of 45 marbles in the bag, of which 28 are NOT blue. The probability of drawing a NOT blue marble is 28/45.

16. We can desginate the point where the lines meet as O. Angles NOK and MOL are vertical angles, so are equal. The diagram tells you the measure of NOK is 90° + 15° = 105°, so that is the measure of (5x)°. The value of x is

... 105/5 = x = 21

17. Division by a fraction is the same as multiplication by its inverse.

$-\dfrac{10}{19}\times -\dfrac{7}{5}=\dfrac{10}{5}\cdot\dfrac{7}{19}=2\cdot\dfrac{7}{19}\\\\=\dfrac{14}{19}$

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A store sells snacks by weight. A six ounce bag of nuts costs 3.60 will a two ounce bag cost more than or less than 1.25

densk [106]

5.30 it is correct hope this works brah

6 0

3 years ago

A leprechaun places a magic penny under a girls pillow. The next night there are 2 magic pennies under her pillow. The following

kiruha [24]

Answer:

After 47 days she will have more than 90 trillion pennies.

Step-by-step explanation:

At the beginning there was 1 penny. At the second day the amount of pennies under the pillow became 2.

The amount of pennies doubled each day. So the series is,

$1,2,4,8,16,32,.....$

This series is in geometric progression.

As the pennies from each of the previous days are not being stored away until more pennies magically appear so the sum of series will be,

$S_n=\dfrac{a(r^n-1)}{r-1}$

where,

a = initial term = 1,

r = common ratio = 2,

As we have find the number of days that would elapse before she has a total of more than 90 trillion, so

$\Rightarrow 90\times 10^{12}\le \dfrac{1(2^n-1)}{2-1}$

$\Rightarrow 90\times 10^{12}\le \dfrac{2^n-1}{1}$

$\Rightarrow 90\times 10^{12}\le 2^n-1$

$\Rightarrow 2^n\ge 90\times 10^{12}+1$

$\Rightarrow \log 2^n\ge \log (90\times 10^{12}+1)$

$\Rightarrow n\times \log 2\ge \log (90\times 10^{12}+1)$

$\Rightarrow n \ge \dfrac{\log (90\times 10^{12}+1)}{\log 2}$

$\Rightarrow n \ge 46.4$

$\Rightarrow n\approx 47$

8 0

2 years ago

The five new teachers at a school were surveyed. Is this sample of teachers at the school likely to be biased?

nordsb [41]

Answer:

yes because since they are new they are all going to have a different opinion on the school than other teachers thats been there for years

hope this helps

have a good day :)

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

A line passes through (9, –9) and (10, –5).Write an equation for the line in point-slope form.

CaHeK987 [17]

Y - y1 = [-9-(-5)]/[(9-10] * (x - x1)

y - (-9) = [-9 + 5] / [-1] * (x - 9)

y + 9 = (-4) / (-1) * (x - 9)

y + 9 = 4(x - 9)

y + 9 = 4x - 36

y = 4x - 36 - 9

y = 4x - 45 This is the slope - intercept form.

y - 4x + 45 = 0 This is the standard form

5 0

2 years ago

What's a story problem for 3.05 dividied by 0.05

puteri [66]

Mr. Smith is putting cookie pieces into equal containers for a science experiment. If there are 3.05 of the containers being used and each cookie piece is 0.05 then how many cookie pieces can fir into the select containers?

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2 years ago