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Irina-Kira [14]
3 years ago
14

7x−9y<5 ​ −2x+4y>5 ​​ Is (3,5) a solution of the system?

Mathematics
1 answer:
Rasek [7]3 years ago
7 0
Yes, it is a solution.
when plugged in, it looks something like this.

21-45< 5
-24 <5. That fits the equation!

-6 + 20> 5
14 > 5. That also fits the equation, so it is a solution!
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A car travels at constant speed for 7 days and covers 1500 miles. What is the speed in centimeters/minute? You may use the (appr
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Answer:

Speed = 23809.52 cm/min      

Step-by-step explanation:

Given : A car travels at constant speed for 7 days and covers 1500 miles.

To find : What is the speed in centimeters/minute

Solution : Formula to find speed is

\text{Speed}=\frac{\text{Distance}}{\text{Time}}

Distance traveled = 1500 miles and time taken = 7 days

\text{Speed}=\frac{\text{1500 miles}}{\text{7 days}}

Now, we have to convert miles into centimeter and days into minutes.

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1 hour= 60 minute

24 hr= 24×60 minute

1 day =  24×60 minute

7 days = 7×24×60 minute = 10,080 minute

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1.6 km = 1.6 × 100000 cm

1 mile = 1.6 × 100000 cm

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Put back the values into speed

\text{Speed}=\frac{\text{1500 miles}}{\text{7 days}}

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\text{Speed}=\text{23809.523 cm/minute}

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