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guapka [62]
2 years ago
10

Andy drove 840 miles in 12 hours. How far could he drive in 3 hours?​

Mathematics
2 answers:
erma4kov [3.2K]2 years ago
5 0
So in order to solve this problem we first have to divided
840 divided by 12 is 70
So that means that Andy drives 70 miles per hour
We need to find out how much miles Andy drives in 3 hours so we have to multiply the number of miles he drives per hour by 3
70*3=210
Therefore,Andy drives 210 miles in 3 hours
liraira [26]2 years ago
3 0
To answer this, we need to first find the rate and the multiply it by 3. 840/12 = 70 miles per hour. Then multiply it by 3. 70*3=210 miles. Another way we can do it is that we can divide 840 by 4 because 12 hours / 4 = 3 hours. 840/4 = 210 miles.
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3 years ago
One pound of swordfish costs as much as 1.5 pounds of salmon. Mrs. O pays $39 for 2 pounds of salmon and 3 pounds of swordfish.
Dimas [21]

Answer:

The ratio of the amount for swordfish to the amount of salmon is 6:4

Step-by-step explanation:

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The price for 1 pound of swordfish = The price of 1.5 pound of salmon

So, On this relation

The price for ( 1 × 2 ) pound of swordfish = The price of ( 1.5× 2 )  pound of salmon

i.e The price for 2 pound of swordfish = The price of 3 pound of salmon

Now According to question

Mrs. O pay the total money for 2 pounds of swordfish and 3 pound of salmon = $ 39

Let the money she pay for swordfish = 2 sw

And The money she pay for salmon = 3 sa

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I.e  2 sw + 3 sa = 39

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or, sa = \frac{39}{6} = \frac{13}{2}

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or, sw = \frac{39}{4}

Now, the ratio of the amount for swordfish to the amount of salmon = \frac{\frac{39}{4}}{\frac{13}{2}}

I.e The ratio = \frac{6}{4}

Hence The ratio of the amount for swordfish to the amount of salmon is 6:4

Answer

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3 years ago
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Read 2 more answers
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