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3 years ago

Which call numbers of the dewey decimal system are the dictionaries in?

1 answer:

4 0

The Dewey Decimal Classification System is a method used to calssify books in the library. It was named after Melvil Dewey who developed it in 1876. The system uses numbers to organize the subjects of each nonfiction books and are divided into 10 main subject groups called categories. Each category is presented by a figure starting from 000 to 999. Each number presents a special topic. Books with the same number are placed in alphabetical order by the last name of the author. The first digit of a three digit number signifies the main class. Suppose you have 500, the 5 in signifies natural sciences and mathematics. The second digit signifies the division and the last digit signifies the sections.

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Find the average rate of change for the given function from x = -3 to x = 1.

Alika [10]

Average rate of change from x = -3 to x = 1 is (f(1) - f(-3))/(1 - (-3)) = (5 - (-3))/(1 + 3) = (5 + 3)/4 = 8/4 = 2

3 0

3 years ago

Big chickens: The weights of broilers (commercially raised chickens) are approximately normally distributed with mean 1387 grams

Nataliya [291]

Answer:

a) 0.2318

b) 0.2609

c) No it is not unusual for a broiler to weigh more than 1610 grams

Step-by-step explanation:

We solve using z score formula

z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation.

Mean 1387 grams and standard deviation 192 grams. Use the TI-84 Plus calculator to answer the following.

(a) What proportion of broilers weigh between 1150 and 1308 grams?

For 1150 grams

z = 1150 - 1387/192

= -1.23438

Probability value from Z-Table:

P(x = 1150) = 0.10853

For 1308 grams

z = 1308 - 1387/192

= -0.41146

Probability value from Z-Table:

P(x = 1308) = 0.34037

Proportion of broilers weigh between 1150 and 1308 grams is:

P(x = 1308) - P(x = 1150)

0.34037 - 0.10853

= 0.23184

≈ 0.2318

(b) What is the probability that a randomly selected broiler weighs more than 1510 grams?

1510 - 1387/192

= 0.64063

Probabilty value from Z-Table:

P(x<1510) = 0.73912

P(x>1510) = 1 - P(x<1510) = 0.26088

≈ 0.2609

1610- 1387/192

= 1.16146

Probability value from Z-Table:

P(x<1610) = 0.87727

P(x>1610) = 1 - P(x<1610) = 0.12273

≈ 0.1227

No it is not unusual for a broiler to weigh more than 1610 grams

8 0

3 years ago

Solve the equation for y. 4.2x−1.4y=2.1

Vlada [557]

Answer:

y=3x- 3/2

Step-by-step explanation:

4.2x−1.4y=2.1

Subtract 4.2x from each side

4.2x-4.2x−1.4y=-4.2x+2.1

-1.4y = -4.2x +2.1

divide each side by -1.4

-1.4y/-1.4y = -4.2x/ -1.4 +2.1/-1.4y

y=3x- 3/2

7 0

3 years ago

Write the equation of the line graphed below

zimovet [89]

Answer:

y = 5/8x + 12

Step-by-step explanation:

Slope = change in y/change in x

slope = 5/8

Using y = mx + b find b.

y = 5/8x + b

-2 = 5/8(-4) + b

b = 1/2

y = 5/8x + 12

good luck, i hope this helps :)

3 0

3 years ago

Read 2 more answers

3x + 2 ≤ 14 -5 + 2x > 15 * -2x + 4 ≥ 18 HaLp i don't gets

sweet-ann [11.9K]

9514 1404 393

Answer:

x ≤ 4
x > 10
x ≤ -7

Step-by-step explanation:

We're guessing you want to solve for x in each case. You do this in basically the same way you would solve an equation.

1. 3x +2 ≤ 14

3x ≤ 12 . . . . . subtract 2

x ≤ 4 . . . . . . . divide by 3

2. -5 +2x > 15

2x > 20 . . . . . . add 5

x > 10 . . . . . . . . divide by 2

3. -2x +4 ≥ 18

4 ≥ 18 +2x . . . . . add 2x

-14 ≥ 2x . . . . . . . subtract 18

-7 ≥ x . . . . . . . . . divide by 2

_____

Additional comment

The statement above that the same methods for solving apply to both equations and inequalities has an exception. The exception is that some operations reverse the order of numbers, so make the inequality symbol reverse. The usual operations we're concerned with are multiplication and division by a negative number: -2 < -1; 2 > 1, for example. There are other such operations, but they tend to be used more rarely for inequalities.

You will note that we avoided division by -2 in the solution of the third inequality by adding 2x to both sides, effectively giving the variable term a positive coefficient. You will notice that also changes its relation to the inequality symbol, just as if we had left the term where it was and reversed the symbol: -2x ≥ 14 ⇔ -14 ≥ 2x ⇔ x ≤ -7 ⇔ -7 ≥ x

5 0

3 years ago

Read 2 more answers