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stiv31 [10]
3 years ago
12

four out of nine dogs weigh less than 20 pounds.What is the decimal equivalent for the number of dogs weighing under 20 pounds.

Mathematics
1 answer:
Nutka1998 [239]3 years ago
7 0

Answer:

.4444...

Step-by-step explanation:

You take 4 and divide it by 9

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Solve 2x-5=7<br><br><br>Pls tell me
velikii [3]

Answer: if solving for x....

x= 6

Step-by-step explanation:

2x-5=7

2x-5+5=7+5

2x-5+5=7+5

2x/2= 12/2

x= 6

7 0
2 years ago
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A rectangular kitchen is 4 meters longer than it is wide. If the area of the kitchen is 192 square feet meters, how many meters
Lunna [17]
Lets x = width
length = x + 4 (4 meters longer than wide)

A = L * W
192 = x ( x +4)
192 = x^2 + 4x
x^2 + 4x - 192 = 0
(x +16)(x-12) = 0
 x - 12 = 0, x = 12
 x + 16 = 0, x = -16
so width x = 12
length = 12 + 4 = 16 (4 meters longer than wide)

answer. J
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3 0
2 years ago
Resuelve el siguiente problema aplicando las estrategias de solución de problemas.
scoundrel [369]
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7 0
2 years ago
A production process is checked periodically by a quality control inspector. the inspector selects simple random samples of 30 f
777dan777 [17]

Answer:

Population Mean = 2.0

Population Standard deviation = 0.03

Step-by-step explanation:

We are given that the inspector selects simple random samples of 30 finished products and computes the sample mean product weight.

Also, test results over a long period of time show that 5% of the values are over 2.1 pounds and 5% are under 1.9 pounds.

Now, mean of the population is given the average of two extreme boundaries because mean lies exactly in the middle of the distribution.

So,   Mean, \mu = \frac{1.9+2.1}{2} = 2.0

Therefore, mean for the population of products produced with this process is 2.

Since, we are given that 5% of the values are under 1.9 pounds so we will calculate the z score value corresponding to a probability of 5% i.e.

             z = -1.6449 {from z % table}

We know that z formula is given by ;  

                Z = \frac{Xbar - \mu}{\frac{\sigma}{\sqrt{n} } } ~ N(0,1)

              -1.6449 = \frac{1.9 - 2.0}{\frac{\sigma}{\sqrt{n} } }     ⇒  \frac{\sigma}{\sqrt{n} }  = \frac{-0.1}{-1.6449}  

                                           ⇒ \sigma = 0.0608 * \sqrt{30}  {as sample size is given 30}

                                           ⇒ \sigma = 0.03 .

Therefore, Standard deviation for the population of products produced with this process is 0.0333.

7 0
3 years ago
Which statement is NOT true?
riadik2000 [5.3K]
And integer is a whole number, negative or positive,  with no decimals or fractions.
A is true.
B is true.
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C is true.
D is false.
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8 0
3 years ago
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