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weeeeeb [17]
3 years ago
7

A piece of a chain's length and weight are in proportion. If 320 cm of chain weighs 8 kg, then

Mathematics
2 answers:
Taya2010 [7]3 years ago
8 0

Answer: 80 cm of chain weighs 2 kg.

r-ruslan [8.4K]3 years ago
7 0

Answer:

 W = 0.025L

Step-by-step explanation:

A piece of a chain's length and weight are in proportion.

If L represents the length in cm and weight is represented by W in kg, then we can write W = aL + b ........(1)

Now, if the length of the chin is 0, then the weight will also be 0. So, from equation (1), we can write W =aL ....... (2) as b becomes zero.

Now, the 320 cm of chain weighs 8 kg.

So, from equation (2), we get, 8 = 320a, ⇒ a = 0.025 kg/cm

So, the equation becomes W = 0.025L (Answer)

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Write down an expression for the total cost of four pencils and two rubbers
Vsevolod [243]

Answer:

4x + 2y

Step-by-step explanation:

We multiply the price of 1 pencil by 4 to get price of 4 pencils plus the price of 1 rubber times 2.

please mark brainliest

6 0
2 years ago
The city of Raleigh has 9,200 registered voters. There are two candidates for city council in an upcoming election: Brown and Fe
sukhopar [10]

Answer:

A) The population of this survey is the registered voters in the city of Raleigh.

B) 9500

C) 200

D) 0.325

E) 3088

Step-by-step explanation:

A) The population of this survey is the registered voters in the city of Raleigh.

B) Population size can be defined as the total number of individuals in a population. Here the total number of individuals are the registered voters in the city. Therefore the size of the population is 9500.

c) Sample size is defined as the number of individual samples in a statistical test. Here the sample size is the 200 randomly selected registered voters. It is denoted as "n".

d) The sample statistic for the proportion of voters surveyed who said they'd vote for Brown would be:

p' = voters for brown / sample size

p' = \frac{65}{200} = 0.325

The sample statistic for the proportion of voters surveyed who said they'd vote for Brown is 0.325

E) The expected number of voters for Brown based on the sample:

0.325 * 9500 = 3087.5

Approximately 3088

The expected number of voters for Brown based on the sample might be 3088 voters.

7 0
3 years ago
Margo can purchase tile at a store for $0.79 per tile and rent a tile saw for $20. At another store she can
TEA [102]

Answer:

$20.00+$0.79=$20.79

$20.79-$1.19=$19.60

5 0
3 years ago
A bicycle has a listed price of $660.95 before tax. If the sales tax rate is 7.25%, find the total cost of the bicycle with sale
skelet666 [1.2K]

9514 1404 393

Answer:

  $708.87

Step-by-step explanation:

The price with tax included is ...

  660.95 + 0.0725×660.95 = 660.95(1 +0.0725) = 708.87

The total cost of the bicycle with tax is $708.87.

8 0
3 years ago
Read 2 more answers
Write the coordinate of the vertices after a translation 8 units left and 13 units down. S(0,10). T(8,10) U(1,5)
Paha777 [63]

Answer:

S(-8,-3), T(0, -3), and U(-7, -8)

Step-by-step explanation:

for all of the coordinates, you would subtract 8 from their X-values, and subtract 13 from their Y-values.

6 0
2 years ago
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