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EastWind [94]
3 years ago
13

Help what is the value of x ?

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
4 0

Answer:

141

Step-by-step explanation:

The interior angles of a polygon with <em>n</em> sides is 180(<em>n</em> - 2) and the polygon has 7 sides, so the sum of its interior angles is 180(7 - 2) = 180(5) = 900.

125 + (x + 7) + 107 + (x - 15) + x + 131 + 122 = 900

Combining like terms,

3x + 477 = 900

3x = 423

x = 141

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12−3/4(d+16)=−5 ANSWER FOR D
antoniya [11.8K]
D=20/3 or in decimal form d=6.666, it keeps going
6 0
3 years ago
An article is $68000 and sold at a profit of 14%. Find the selling price
marin [14]

Answer:

The selling price is:  \$77,520

Step-by-step explanation:

Step 1: Identify the profit made

A profit of 14% is made on the article.

This means that the article was sold at a price that had 14% of its original price added to it.

The 14% of the original price is:

14\% \times 68000\\=\frac{14}{100}\times 68000\\\\\text{Calculate the value}\\\frac{14}{100}\times 68000\\=9520

So, a profit of $9520 was made

Step 2: Calculate the selling price

The selling price will be the sum of the original price and the profit.

The selling price is:

68000+9520\\=77520

7 0
1 year ago
Which of the following is not an identity?
Shkiper50 [21]
A ) cos² x · 1 / sin x - 1 / sin x = - sin x
cos² x - 1 / sin x = - sin x 
- sin² x / sin x = - sin x
- sin x = - sin x     ( correct )
B ) sin x ( cos x / sin x + sin x / cos x ) = 1 / cos x
sin x · ( cos² x + sin²x ) / sin x cos x = 1 / cos x
sin x · 1 / sin x cos x = 1 / cos x
1 / cos x = 1 / cos x  ( correct )
C ) cos² x - sin² x = 1 - 2 sin² x
1 - sin² x - sin² x = 1 - 2 sin² x
1 - 2 sin² x = 1 - 2 sin² x   ( correct )
D ) 1/sin²x + 1/ cos²x = 1
cos²x + sin² x / sin² x cos² x = 1
1 / cos² x sin² x = 1
cos²x sin² x ≠ 1
Answer: D ) is not an identity. 
8 0
3 years ago
What number is the opposite of 659? Enter your answer in the box below.
makkiz [27]

Answer:

Additive opposite = - 659

Multiplicative opposite = \frac{1}{659}

8 0
3 years ago
What is the domain and range of y = x+1/x-1
nalin [4]
y = \frac{x + 1}{x - 1}
<u>Domain</u>                         <u>Range</u>
    -3                                 ¹/₂
    -2                                 ¹/₃
    -1                                  0
     0                                 -1
     1                           undefined
     2                                  3
     3                                1¹/₂

8 0
4 years ago
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