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dybincka [34]
2 years ago
10

HELP Math will give 25 brainly points

Mathematics
2 answers:
aleksklad [387]2 years ago
7 0
51 degrees should be the correct answer
77julia77 [94]2 years ago
4 0

9514 1404 393

Answer:

  51°

Step-by-step explanation:

The angles where the expressions are given are a linear pair, so total 180°.

  (3x +15) +(10x +9) = 180

  13x = 156 . . . . . . . . . . . . . . . subtract 24, collect terms

  x = 156/13 = 12

Then the acute angle is ...

  3x +15 = 3(12) +15 = 36 +15 = 51

The stairs make an angle of 51° with the basement floor.

_____

<em>Additional comment</em>

Building code requires the rise to be not more than 8 and the run not less than 9, so the maximum angle is about 41.6°. A 51° staircase would not meet code.

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The correct answer is 12 and a half or 13 weeks.

Step-by-step explanation:

First, convert the values to decimals.

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Then, divide miles of road that need to be repaved by the number of miles that are repaved per week.

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Round that up to 12 and a half weeks or 13 weeks.

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gulaghasi [49]
I agree I personally think it’s C too! :)
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Ksju [112]

Answer:

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Step-by-step explanation:

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