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Serga [27]
3 years ago
9

What is the value of x? x =

Mathematics
1 answer:
mariarad [96]3 years ago
7 0

Answer:

hello :  x = 98°

Step-by-step explanation:

note :

sum of angles in polygonal is :  ( n -2) × 180° ..... n :  number of side

in  this exercice  : n = 7

sum of angles is : (7 -2 ) × 180° = 5× 180° = 900 °

x = 900° - ( 142° +110° +140° +142° +122°+146°) = 900° - 802°

x = 98°  


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Find all polar coordinates of point P where P = (9,pi divided by 5).
RSB [31]

Answer:

(-9, π/5 + (2n + 1)π)

Step-by-step explanation:

Adding any integer multiple of 2π to the direction argument will result in full-circle rotations, which are identities, so this family is equivalent to the give coordinates:

(9, π/5 + 2nπ), for any integer n

Also, multiplying the radius by -1 is a point reflection, equivalent to a half-turn rotation. Then add π to the direction for another half turn, and the result is another identity. So this too is equivalent to the given coordinates:

(-9, π/5 + (2n + 1)π), for any integer n

7 0
3 years ago
The age of a father is 2 less than 7 times the age of his son. In 3 years, the sum of their ages will be 52. If the son’s presen
s2008m [1.1K]

Answer:

First,

the age of the son: s

the age of the father is 2 less than 7 times the age of his son: 7s - 2

In 3 years, the sum of their ages will be 52, In 3 years, the age of the sun will

increase 3, so s+3. Also, the age of his

father also increase 3, (7s-2)+3

(s+3)+ [(7s-2)+3] = 52 is the equation.

5 0
2 years ago
Read 2 more answers
A city police force is made up of 24% females. If there are 72 females on the force, how many males are on the force?
erastovalidia [21]

Answer:

228 males

Step-by-step explanation:

Let x be the number of males.

This means x + 72 is the total number of people.

So \frac{72}{x+72} is the fraction of females in the force.

Thus, we can form the equation:

\frac{72}{x+72} = 0.24

x+72 = \frac{72}{0.24}

x = \frac{72}{0.24} -72

x = 228

Thus, the answer is 228 males.

6 0
3 years ago
Three tickets to a concert cost $54. How much do 7 tickets cost? A. $58 B. $72 C. $108 D. $126
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The answer is D $126,if three cost $54 that means one costs $18 and just multiply it with seven
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3 years ago
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25% is the percent increase
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