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3 years ago

20 points brainliest!!!!

Mathematics

2 answers:

maksim [4K]3 years ago

7 0

Answer:

c i think

Step-by-step explanation:

Ad libitum [116K]3 years ago

7 0

Answer:

Step-by-step explanation:

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A regular polygon with an exterior angle of 20° .

Vedmedyk [2.9K]

Since regular polygon has same sides, the perimeter of other sides are also 6cm

i found out there are 9 sides. so if question A is asking the perimeter of the whole sides except the one mentioned it will be 6cm×8 = 48cm

for question B
$use \: the \: formula \: area = \frac{a \times p}{2}$
the answer is 222.55cm squared

5 0

4 years ago

PLEASE HELP IT IS ALMOST DUE !!

zhenek [66]

Answer:

it is a function

Step-by-step explanation:

Because on the X-axis there is no numbers repeating making it a function

3 0

3 years ago

This is VERY URGENT, so 50 points if you answer correctly!

mariarad [96]

Answer:

The circumference is 31.43 cm

The ratio of the circumference to the diameter is equal to 3:1

Step-by-step explanation:

Thed formular for the circumference of a circle is 2 $\pi$ r or $\pi$ d

where d = diameter and r = radius

if d = 10 cm, and $\pi$ = 3.143, then circumference of the circle can be given as

3.143*10 = 31.43 cm

The ratio of the circumference to the diameter can be given as 31.43:10

and that can be given as 3.143:1

or 3:1, for the nearest whole number

3 0

4 years ago

Find the area of the rectangle with a length of (3x-5) and a width of (2x+7). <br> HELP PLS

GarryVolchara [31]

Answer:

7 0

3 years ago

The function f(x,y)=2x + 2y has an absolute maximum value and absolute minimum value subject to the constraint 9x^2 - 9xy + 9y^

deff fn [24]

Answer:

the minimum is located in x = -5/3 , y= -5/3

Step-by-step explanation:

for the function

f(x,y)=2x + 2y

we define the function g(x)=9x² - 9xy + 9y² - 25 ( for g(x)=0 we get the constrain)

then using Lagrange multipliers f(x) is maximum when

fx-λgx(x)=0 → 2 - λ (9*2x - 9*y)=0 →

fy-λgy(x)=0 → 2 - λ (9*2y - 9*x)=0

g(x) =0 → 9x² - 9xy + 9y² - 25 = 0

subtracting the second equation to the first we get:

2 - λ (9*2y - 9*x) - (2 - λ (9*2x - 9*y))=0

- 18*y + 9*x + 18*x - 9*y = 0

27*y = 27 x → x=y

thus

9x² - 9xy + 9y² - 25 = 0

9x² - 9x² + 9x² - 25 = 0

9x² = 25

x = ±5/3

thus

y = ±5/3

for x=5/3 and y=5/3 → f(x)= 20/3 (maximum) , while for x = -5/3 , y= -5/3 → f(x)= -20/3 (minimum)

finally evaluating the function in the boundary , we know because of the symmetry of f and g with respect to x and y that the maximum and minimum are located in x=y

thus the minimum is located in x = -5/3 , y= -5/3

4 0

4 years ago