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Zina [86]
3 years ago
7

Work out 30 – 3 + 7 x 2

Mathematics
2 answers:
strojnjashka [21]3 years ago
7 0
The correct answer is 41
zhenek [66]3 years ago
5 0
30 - 3 + 7 x 2

30 - 3 + 14

27 + 14

41
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The distance between two cities is 87 km. What is the distance between them on a map drawn at a scale of 1:600,000?
Elena L [17]

The distance between them on a map at a scale 1 : 600,000 is 14.5 cm

Step-by-step explanation:

Scale drawing:

  • Is used to represent a real object with accurate sizes reduced or enlarged by a certain amount (called the scale)
  • States the ratio of a length in the drawing to an equivalent length in the real world
  • 1 : 100 means 1 unit in drawing represents 100 units in real life

∵ The distance between two cities is 87 km

∵ The distance between them on a map drawn at a scale of

   1 : 600,000

- That means each 1 cm represents in real life 600,000 cm, so

   you must change the kilometer to centimeter

∵ 1 km = 100,000 cm

∴ 87 km = 87 × 100,000 = 8,700,000 cm

Now let us use the ratio method

→   1    :    600,000

→   x    :    8,700,000

By using cross multiplication

∴ x × 600,000 = 1 × 8,700,000

- Divide both sides by 600,000

∴ x = 14.5

∴ The distance between them on the map = 14.5 cm

The distance between them on a map at a scale 1 : 600,000 is 14.5 cm

Learn more:

You can learn more about the scale drawing in brainly.com/question/570757

#LearnwithBrainly

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4 years ago
Please need help on this please
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3 years ago
What is 3(2x-8)=9x+6<br> Please show work
Gennadij [26K]
3(2x-8)=9x+6
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Answer:

Yes they do, the proportion of 1:3 as 1 x 8=8, and 3 x 8=24, and 5 x 1=5, and 5 x 3=15

Step-by-step explanation:

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It is known that y varies directly as x, and y=10 when x=2. What is the value of x if y=12?
Firdavs [7]

Answer:

Step-by-step explanation:

i think you multiple the 10 and the 12

7 0
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