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dybincka [34]
3 years ago
10

HELP Math will give 25 brainly points

Mathematics
2 answers:
aleksklad [387]3 years ago
7 0
51 degrees should be the correct answer
77julia77 [94]3 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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Use the grouping method to factor this polynomial completely.<br> 3x3 + 12x2 + 2x + 8
dezoksy [38]

Answer:

(3x^2 + 2)(x + 4).

Step-by-step explanation:

3x3 + 12x2 + 2x + 8

3x^2(x + 4) + 2(x + 4)   The  x + 4 is common to the 2 groups so we have:

(3x^2 + 2)(x + 4).

3 0
3 years ago
Geela makes orange paint with 5 parts yellow to
Oxana [17]
Answer:

Geela would need 9 yellow parts


Explanation:

Originally, the Geela needed more yellow than red and the difference was 4 parts.

6-2=4 parts


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3 0
3 years ago
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Alborosie

Answer:

17/2

Step-by-step explanation:

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x=17/2

8 0
3 years ago
Which of the following sets are infinite sets?
vova2212 [387]

Answer:

option 2,5 are correct

Step-by-step explanation:

mark me as brainliest ❤️

7 0
3 years ago
Read 2 more answers
What is 235,000 rounded to the nearest hundred thousand
MAVERICK [17]
To round to the nearest hindered thousand in 235,000 you would underline the number in the ten thousand place. In this case it's 3. Then you look at the number you've underlined and if it is over 5 then you round the miner in front of it up by 1 if it is under 5 then you leave it the same and all the numbers after it becomes zeros
6 0
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