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3 years ago

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

Mathematics

1 answer:

Dafna11 [192]3 years ago

5 0

Answer:

B. 80 cm of chain weighs 2 kg.

Step-by-step explanation:

In order to choose the correct answer, we need to define the comparative relation between the length and weight of the chain. We will do this by performing the simple operation of division.

It is easier to divide the larger number by the smaller and that is what we will show here (although you can do as you wish and still get the same result - it's math!):

320 ÷ 8 = 40

The result we got is 40. This means that the length of the chain is equal to the value of forty of its weights! And this will be the operation we will perform in order to determine the right answer:

A) Does 2 (kg) multiplied by 40 equal 40 (cm)? No, therefore, it is incorrect.

B) Does 2 (kg) multiplied by 40 equal 80 (cm)? Yes, this answer is correct!

Just in case, we will perform this action with the rest of the possible choices:

C) 4 kg × 40 = 160 and NOT 80 cm.

D) 2 kg × 40 = 80 and NOT 160 cm.

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Find the dimensions of a rectangle whose perimeter is 16 meters and whose area is 15 square meters.

Veseljchak [2.6K]

2(x+y)=16,
x+y=16/2=8
y=8-x
x*y=15
x(8-x)=15
8x-x^2=15
x^2-8x+15=0
x^2-3x-5x+15=0
x(x-3)-5(x-3)=0
(x-3)(x-5)=0
x=3,5
when x=3
y=8-3=5
when x=5
y=8-5=3
length=5 meters
width=3 meters.

3 0

3 years ago

Read 2 more answers

2/3 is equivalent to?

Crank

4/6 6/9 40/60 the first one is mulitied by two third one is multiplied by three and the fourth one is multiplied by 20

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3 years ago

Which statement best describes the use of a stimulation to predict the probability that two randomly chosen people will both hav

777dan777 [17]

Answer:

The answer is "The Last choice".

Step-by-step explanation:

Please find the complete question in the attached file.

It is the phrase that perfectly represents the usage of a simulation for an estimate of the likelihood of the birthday of 2 randomly chosen persons on a Monday.

In a week there are 7 days, so seven choices are available, and just one Monday. Therefore, it is probable that $\frac{1}{7}$ will occur on a Monday to a birthday individual.

The first person will have a probability $\frac{1}{7}$ .

The second person also has a probability $\frac{1}{7}$ .

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3 years ago

Which could be the side lengths of a right triangle?

Vsevolod [243]

Answer:

Step-by-step explanation:

90+45+45=180

All triangles equal 180.

Its B because if one angle is 90° then the other angles will equal each other. It cant be 60° and 30° because they dont equal, so your final answer is B.

Hope this Helps!!! :)

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3 years ago

Read 2 more answers

HELP ITS IMPORTANT PLZZZ

Sliva [168]

for the table part, for the first column put all the information in the correct area (like put the price of the Reuben next to the Rueben section. Then just subtract them all by $20 (give brainliest if others answer)

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3 years ago