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makkiz [27]
3 years ago
10

A neighborhood park is circular in shape. One sector of the park needs repairing, so officials would like to block off that port

ion with barricades. The area of the sector is 45 yd2, and o=72. Find the length of one side of the barricades (i.e., the radius of the circle).
Mathematics
2 answers:
IgorC [24]3 years ago
7 0
I will assume that 0 =72 refers to that the angle of the sectoris 72°.

If so, this sector represents 72°/360° = 1/5 of the total circle.

Then the area of the total circles is 5 * 45yd^2 = 225 yd^2

The radius is obtained from:

Area = π(r^2) = 225 yd^2

r^2 = 225 yd^2 / π = 71.62 yd^2

r = √(71.62yd^2) = 8.5 yd

Answer: 8.5 yd

Julli [10]3 years ago
3 0

Answer: B (r = 15 yd)

Step-by-step explanation: I did this

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Prove that x+1 is a factor of x^n+1 where n is an odd positive integer.​
egoroff_w [7]

Answer:

because x^n+1 =

the number which is n and n is an odd number and my odd number is 3 so

x^3+1= 4

= x^4

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3 years ago
Write the ratios for Sin A Cos A, and Tan A.
Nataliya [291]

Step-by-step explanation:

sinA= BC/AC

= 24/26

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cosA= AC/AB

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4 0
3 years ago
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The Miller family visited Mama's Kitchen and ordered 4 hamburgers and 3 medium fries and paid $18.69. James ordered a medium dri
sergij07 [2.7K]
To answer the question, let x be the cost of each hamburger, y be the cost of each medium fries, and z be the cost of each medium drink. The equations that are described in the problem are,
       (Miller )        4x + 3y = 18.69
       (James)       x + 2y + z = 8.66
       (Steven)      2x + y + z = 10.27
Solving simultaneously for the values of the variables give x = 3.36, y = 1.75, and z = 1.8. 
Thus, each hamburger costs $3.36. Each medium fries cost $1.75, and each drink costs $1.8.
3 0
3 years ago
The average speed to go by car from home to college is 30 miles per hour. The average speed to go back home from college is 20 m
Levart [38]

Answer:

24 mph for both 60 miles and 40 miles.

Step-by-step explanation:

We need to find how long it takes to get to college and from it.

Speed x time (x) = Distance (60)

30x = 60

x=2

It takes two hours to get to college

20x = 60

x = 3

It takes 3 hours to get back. It's a total of 5 hours, 2 hours at 30mph and 3 at 20. Now we need to find the average

30+30+20+20+20=120

120/5= 24

The average speed for the round trip is 24.

To do the second part, we follow the same process, but replace 60 with 40 for distance.

30x=40

x= 1.33

20x=40

x=2

We can add the total distance and divide by total time to find the average.

The total distance is 80. Time is 3.33

80/3.33=24

The average speed is still 24.

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3 years ago
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