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Phantasy [73]
3 years ago
6

Circumference of a circle

Mathematics
1 answer:
DIA [1.3K]3 years ago
8 0

Answer:

62.8ft

Step-by-step explanation:

The formula to get the circumference is π × D (π × diameter) You need to multiply the value of π (3.14) by the diameter of this circle (20).

20×3.14= 62.8ft

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Triangle QED is congruent to Triangle QRS<br><br>a. True<br>b. False<br>​
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Your answer is false your welcome
5 0
3 years ago
Select the two values of x that are roots of this equation.<br>x + 2x - 6 = 0​
VLD [36.1K]

For this case we must solve the following quadratic equation:

x ^ 2 + 2x-6 = 0

Where:

a = 1\\b = 2\\c = -6

The solution is given by:

x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}

Substituting:

x = \frac {-2 \pm \sqrt {2 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-2 \pm \sqrt {4 + 24}} {2}\\x = \frac {-2 \pm \sqrt {28}} {2}\\x = \frac {-2 \pm \sqrt {2 ^ 2 * 7}} {2}\\x = \frac {-2 \pm2 \sqrt {7}} {2}\\x = -1 \pm \sqrt {7}

Thus, we have two roots:

x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}

ANswer:

x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}

8 0
3 years ago
Write -7.5 as a common fraction.
Alina [70]

Answer:

-15/2  (or  -7 1/2)

Step-by-step explanation:

-7.5 is equal to -75/10.

When you simplify it, you get:

-15/2  which simplifies to -7 1/2

4 0
3 years ago
The center of the circle whose equation is (x + 2)² + (y - 3)² = 25 is
joja [24]

Answer:

Step-by-step explanation:

center: (-2,3)

Radius: 5

4 0
3 years ago
Jake went to a fair and spent $5 on admissions, $6.50 on games, and $7.21
asambeis [7]

Answer:

Jake has <em>$11.29 </em>dollars left.

Step-by-step explanation:

To find the answer, we will add up<em> $5 + $6.50 + $7.21</em> and we get<em> $18.71</em>.  Now <em>subtract $30 from 18.71</em>, which is <em>$11.29</em>.  Therefore, <em>Jake has $11.29 dollars left.</em>

8 0
3 years ago
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