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Marta_Voda [28]
2 years ago
6

given that the measurement is in centimeters, find the circumference of the circle to the nearest tenth. (use 3.14 for pi)

Mathematics
2 answers:
Anna11 [10]2 years ago
5 0
Answer: 5

Explanation: C = 2 • 3.14(pi) • 5(r). Use calculator like me :D
Jlenok [28]2 years ago
3 0

Answer:

b

Step-by-step explanation:

circumference =2×pi×r=5×2×3.14=31.4

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An initial population if 1000 starfish double each year for 4 years. What is the population after 4 years?
Zolol [24]

Answer:

16,000 starfish

Step-by-step explanation:

year 0: 1000

year 1: 2000

year 2: 4000

year 3: 8000

year 4: 16000

8 0
2 years ago
FINDDD VALUE OF Y!!!!
solmaris [256]

Answer:

The sum of the internal ángles = 360°

(3y+40)°  and  (3x-70°) are suplementary angles = 180°

then:

(3x-70) + (3y+40) + 120 + x = 360     ⇒ first eq.

(3y+40) + (3x-70) = 180      ⇒  second eq

development:

from the first eq.

3x + x + 3y  =  360  + 70 - 40 - 120

4x + 3y = 430 - 160

4x + 3y = 270       ⇒  third eq.

3y = 270 - 4x

y = (270 - 4x) / 3    ⇒  fourth eq.

from the secon eq.:

3y + 3x = 180 + 70 - 40

3y + 3x = 250 - 40

3y + 3x = 210    ⇒  fifth eq.

multiply by -1  the fifth eq and sum with the third eq.

  -3y  - 3x = -210    ⇒   (fifth eq. *-1)

   3y  + 4x = 270

⇒  0   +  x  = 60

x = 60°

from the fourth eq.

y = (270-4x)/3

y = (270-(4*60)) / 3

y = (270 - 240) / 3

y = 30/3

y = 10°

Probe:

from the first eq.

(3x-70) + (3y+40) + 120 + x = 360

3*60 - 70 + 3*10 + 40 + 120 + 60 = 360

180 - 70 + 30 + 40 + 120 + 60 = 360

180 + 30 + 40 + 120 + 60 - 70 = 360

430 - 70 = 360

Answer:

y = 10

7 0
3 years ago
Evaluate x+x+x+2x for x=2
Nutka1998 [239]

Answer:

10

Step-by-step explanation: substitute 2 for all the x’s and add.

4 0
3 years ago
Read 2 more answers
The points (0, 5) and (4, 13) lie on the graph of a linear function. What is the rate of change of the function?
Viefleur [7K]
The rate of change is the slope of this line
m = (y2 - y1)/(x2 - x1) = (13 - 5)/(4 - 0) = 8/4 = 2
6 0
3 years ago
(х-y)²-3(x-y) how do you factorise this equation?​
Kazeer [188]

Answer:

(x-y)(x-y-3)

Step-by-step explanation:

(x-y)² - 3(x-y)

take (x-y) common,

(x-y)(x-y-3)

4 0
3 years ago
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