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Natalka [10]
3 years ago
12

Melissa has a student dictionary on her desk. Her dictionary contains 86 pages. In this dictionary, more words start with the le

tter "S" than any other letter, occupying 15 full pages.
If she opens up the dictionary at random, what is the probability that the page contains words starting with "S"?
A. 16/101


B. 1/86


C. 15/86


D. 7/43
Mathematics
1 answer:
iragen [17]3 years ago
6 0
Simple it 15/86 because there are 15 pgs of words starting with the letter S out of the 86 pgs of this dictionary
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the mean of the ages of 5 brothers is 13 years. If the ages of four of the brothers are 12, 16, 14, and 8, how old is the fifth
patriot [66]

Brothers

1. 12

2. 16

3. 14

4. 8

5. ?

___________________

mean of the ages of 5 brothers is 13 years

13\text{ = }\frac{12\text{ + 16 + 14 + 8  + x}}{5}

13\cdot5\text{ =  x + 50}

65-50\text{ = x }\text{ x = 15  }
6 0
2 years ago
Simplify the expression to a + bi form:<br> (8 + 10i) - (9+9i)
wlad13 [49]

Answer:

-1+i

Step-by-step explanation:

(8+10i)-(9+9i)

8+10i-9-9i

8-9+10i-9i

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-1+i

8 0
3 years ago
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When there is a coefficient with a<br> fraction, you should...
Katarina [22]

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divide each term in the equation by the coefficient or multiply each term by the reciprocal of the coefficient

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3 0
3 years ago
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A container contains tiles numbered from 1 through 40. A tile is drawn randomly and replaced. Then a second tile is drawn random
amid [387]

Answer:

The correct answer is \frac{1}{1600}.

Step-by-step explanation:

A container contains tiles numbered from 1 through 40.

Let the experiment be to drawn a tile randomly from the container. The draws are carried on by replacement method. Then a second tile is drawn randomly.

Probability that the first tile is number 7 = \frac{Possible outcomes}{Total outcomes} = \frac{1}{40}

Probability that the second tile is number 25= \frac{Possible outcomes}{Total outcomes} = \frac{1}{40}

Thus the probability of the first tile is number 7 and the second tile is number 25 is given by \frac{1}{1600}.

7 0
3 years ago
Jack is 3 times a as old as lacy. 8 years ago the sum of their ages was 25. how old are they now?
OlgaM077 [116]


Let x = age of jack

Let y = age of Lacy

x=3y (Jack age is 3 times that of Lacy)

(x+y)-8 = 25

Substituting value of x:

(3y+y) -8 = 25

4y - 8 = 25

4y = 33

y = 33/4 = 8.25 or 8 years 3 months (age of Lacy)

x = 3(8.25) = 24.75 or 24 years 9 months (age of Jack)

Checking:

Substituting in equation ( x + y ) -8 = 25

24.75 + 8.25 - 8 = 25

25 = 25



3 0
3 years ago
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