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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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Find the Volume of a rectangular box (cuboid) with length = 2ab, breadth = 3ac and height = 2ac is given.
blondinia [14]

Answer:

you have to multiply all 3 given measurements together to find the volume

12a^3bc^2

Step-by-step explanation:

7 0
3 years ago
Answer the photo below thanks
Ad libitum [116K]

Answer:

6x60=360

Step-by-step explanation:

60

6 0
3 years ago
A straight line with the equation y=ax-3 goes through the point (2,11). Work out the value of a
Rzqust [24]

The value a is 7.

<h3>What is Straight Line?</h3>

A line is simply an object in geometry that is characterized under zero width object that extends on both sides. A straight line is just a line with no curves.

Here, the given equation of line

      y = ax -3

line passing through point (2, 11), then

    11 = a X 2 - 3

    11 + 3 = 2a

     2a = 14

      a = 7

Thus, the value a is 7.

Learn more about Straight line from:

brainly.com/question/20492082

#SPJ1

4 0
2 years ago
9^5•9^8 rewrite the following expression using each base only once
alina1380 [7]
Your answer would be 9^13
7 0
3 years ago
Confused can someone help
Alex

Answer:

B.   3x^2 - 2x - 1.

Step-by-step explanation:

(f + g)x = f(x) + g(x)

= -4x + 3 + 3x^2 + 2x - 4

Adding like terms we get the answer:

= 3x^2 - 2x - 1.

7 0
4 years ago
Read 2 more answers
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