Here is a double number line showing that it costs $3 to buy 2 bags of rice:

1. At this rate, how many bags of rice can you buy with $12? ___________

2. Find the cost per bag. _____________

3. How much do 20 bags of rice cost? _____________

Answer:

1. 8 bags of rice

2. $1.50 per bag

3. $30

Step-by-step explanation:

For #1, you set up the proportion 3 over 2 is equal to 12 over x and solve by cross multiplication. Then, you should get the answer of 8 bags. For #2, you do $3 divided by 2 to get the answer of $1.50. For #3, you use your answer from #2 and do 1.5 times 20 to get $30.

1. The cost of 12 bags of rice is 18 dollars.

2. Per bag of rice cots 1.5 dollars.

3. The cost of 20 bags of rice is 30 dollars.

A unitary method is a mathematical technique for determining the value of a single unit then we can derive any no. of units by multiplying it by the single unit.

Given it costs 3 dollars for 2 bags of rice.

We know if we determine the cost of one bag of rice we can find out the cost of any no. bags of rice.

∴ 2 bags of rice cost 3 dollars,

So, 1 bag of rice cots (3/2) dollars = 1.5 dollars.

1. At the rate of 1.5 dollars per bag of rice 12 bags of rice will cost (1.5×12) dollars = 18 dollars.

2. The cost per bag of rice is 1.5 dollars.

3. The cost of 20 bags of rice is (1.5×20) dollars = 30 dollars.

learn more about unitary method here :

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In the world’s coldest freezer, sodium gas was cooled to a temperature of 78.5°C below zero and then cooled 194.65°C more. What was the new temperature of the sodium gas?
–273.15°C
–272.7°C
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Which list shows the numbers in increasing order?
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A community center charges x dollars for a summer activity if individuals are signed up before the day of the activity. Individuals who sign up the day of the activity are charged a fee of x plus 0.20 x dollars. Which expression also represents the fee for signing up the day of the activity, and what does it mean about the fee?

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0.8 x; individuals signing up the day of the activity get charged 20% more

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4 kg, 35 grams = ____ grams

Help please!!!!!!!!!!!!!!

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1/3 x 6/7 giveing brainlist for best answer

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Which statement correctly describes the expression (15)(-8)?

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Help please!!!! there are three more after this.

helpppppppppp giveing brainlist

word problem

TRAIL MIX
The equation 4.05p+ 14.40 = 4.50(p+ 3) represents the number p of pounds of peanuts you need to make trail mix. How many pounds of peanuts do you need for the trail mix?

Help‍I’m too dumb for this

Which is greater?
x + 3 - x -(1+ 2x + 2)
x - 1 - x + 2 -(2 + x - 1)

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( - 1, - 7 )
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( - 6, - 4 )
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2.760
-2.167
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Answer in 2 complete sentences.

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