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artcher [175]
2 years ago
5

One of the angles of a regular octagon has a measure of (7x-5) What is the value of x?

Mathematics
2 answers:
Nesterboy [21]2 years ago
6 0

Answer:

20

Step-by-step explanation:

Regular octagon means that each angle is 135 degrees, so 135 = (7x - 5).

135 = 7x - 5,

135 + 5 = 7x,

140 = 7x,

140 / 7 = x,

20 = x

SIZIF [17.4K]2 years ago
4 0

Answer:

  x = 20

Step-by-step explanation:

The interior angles of a regular octagon have measures of ...

  180° -360°/8 = 135°

We want that equal to the given expression.

  7x -5 = 135

  7x = 140 . . . . add 5

  x = 20 . . . . . divide by 7

The value of x is 20.

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andreev551 [17]

Answer:

How would we show you

5 0
3 years ago
Consider a circle centered at C(0,0). If the point P(3,5) lies on the circle, then which of the following points also lies on th
Zarrin [17]

Answer:

C

Step-by-step explanation:

First find the equation of the circle

the general formula for a circle (x-h)² + (y-k)² = r² where (h=0, k=0) are the coordinates of the center and r is the radius that we do not know

the distance between the center (0, 0) and the point (3,5) is the radius

distance formula d² = (x2-x1)² +(y2-y1)²  where (x1=0,y1=0) and (x2=3, y2=5)

d² = (3-0)² + (5-0)² = 3² +5² = 9+ 25 = 34 =r²

(x-0)² + (y-0)² = 34 ; x²+y² =34 is the equation of the circle

Second check if any of the points are on the circle by substituting x and y with de given coordinates.

A. for (-2, 6) we have (-2)²+6² =34 so 4+36 =34 false

B. for (6, -√5) we have 6²+(-√5)² =34 so 36+5=34 false

C. for (1, √33) we have 1²+(√33)² =34 so 1+33 =34 true

D. for (-2√2, 4) we have (-2√2)²+4² =34 so 8+16=34 false

8 0
3 years ago
Which of the following is the number of zeros in the cube of 900​
igor_vitrenko [27]

{900}^{3}

would have 6 zeros

7 0
3 years ago
Write an expression to represent: four less than the quotient of a number x and 5
Serjik [45]

Answer:

x/5 -4

Step-by-step explanation:

Four less than is subtracting four.

The quotient of a number x and 5= x/5

8 0
3 years ago
If carrots were 50 cent less per pound , how much would victora have paid for 8.5 pounds of carrots
Alex_Xolod [135]

Answer:

it would be 4.25

Step-by-step explanation:


5 0
3 years ago
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