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Ira Lisetskai [31]
3 years ago
5

Two times the sum of a number and 4 equals 30

Mathematics
1 answer:
tino4ka555 [31]3 years ago
3 0

Answer: 11

Step-by-step explanation: write the equation.

2(x+4)=30

Divide by 2

x+4=15

Subtract 4

x=11

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Answer:

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Three times a number, minus 2, is equal to two times the number, plus 7.
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Step-by-step explanation:

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Beatriz is reading a book tgat has 530 pages. If she reads 10 pages a day, how many days will it take her to finish the book?
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The equation you want to use is this:

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6 0
3 years ago
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A mountain railway AB is of length 864m and rises at an angle of 120° to the horizontal.
Ainat [17]

Answer:

The height above sea level at <em>B</em> is approximately 1,604.25 m

Step-by-step explanation:

The given length of the mountain railway, AB = 864 m

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∴ Δh = 864 m × sin(120°) ≈ 748.25 m

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∴ h₂ ≈ 856 m + 748.25 m = 1,604.25 m

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Answer:

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Hope it helps!!!

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2 years ago
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