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noname [10]
3 years ago
10

Which expression is equivalent to 2 (a + 3) when a = 3? 2 (3) 5 (3) 2 (3) + 3

Mathematics
1 answer:
castortr0y [4]3 years ago
8 0

Answer:

12

Step-by-step explanation:

2 (a + 3)

a=3

2(3+3)

2(6)

=12

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The time it takes to fly from Los Angeles to New York varies inversely as the speed of the plane. If
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Answer: speed is  540 km/h

Step-by-step explanation:   Lets mark speed as v.

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Or using inverse proportions :   10 h / 6 h  =  v / 900 km/h  .

Before multiplying you turn lastproportion around :

10 h / 6 h = 600 km/ h / v   ,which gives   10 v = 6 · 900 km/h

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3 0
3 years ago
While traveling to the office, dolly drives her car at a speed of 60 kmph and then suddenly the car stopped on half of her dista
lisabon 2012 [21]

The average speed of Dolly is 33.33kmph.

Average Speed:

The average speed is defined as the total distance travelled by the object in a particular interval of time. It can be calculated by dividing the total distance travelled by the total time taken.

So, Average Speed = total distance / total time

Here,

Let the total distance is 100 km.

Therefore, consider she will travel 60 km at speed of 60 kmph , 30 km at speed of 30 kmph and 10 km at speed of 10 kmph.

she will required times of 1 hour, 1hour and 1hour

So,

Average speed = 100 / (1 + 1 + 1)

=> 100 / 3 = 33.33

To know more about Average speed here

brainly.com/question/12322912

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6 0
2 years ago
Which simplified fraction is equal to 0.1ModifyingAbove 7 with bar? StartFraction 9 Over 17 EndFraction StartFraction 8 Over 45
Kazeer [188]

Answer:

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Step-by-step explanation:

Define x to be the value of your fraction:

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____

When in doubt, you can use your calculator to see which fraction gives you 0.1777777778.

_____

We multiplied by 10^1 above, because there is 1 repeating digit. The power of 10 we use matches the number of repeating digits.

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3 years ago
A scuba diver is positioned at -30 feet. How many feet will she have to rise to change the position to -12 feet?
marshall27 [118]

Answer: 18

Step-by-step explanation:

5 0
3 years ago
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