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laiz [17]
3 years ago
11

Pi owns a cornfield and has placed fences around four polls, A, B, C, D that delimit the edges of the field. He needs to drive a

round the field every day to check whether anybody has tried to break in. The four poles are located at:
A (-2,1)
B (3,-11)
C (-2,-23)
D (-7,-11)

How many miles will pi drive if he starts at pole A and drives around the entire border of the field?

(please show the work)
Mathematics
1 answer:
olga2289 [7]3 years ago
8 0

Answer:

52 miles

Step-by-step explanation:

A to B:

sqrt( (3 - (-2))^2 + (-11 - 1)^2 )

sqrt( (5)^2 + (-12)^2 )

sqrt( 25 + 144 )

sqrt( 169 )

13

B to C:

sqrt( (-2 - 3)^2 + (-23 - (-11))^2 )

sqrt( (-5)^2 + (-12)^2 )

sqrt( 25 + 144 )

sqrt( 169 )

13

C to D:

sqrt( (-7 - (-2))^2 + (-11 - (-23))^2 )

sqrt( (-5)^2 + (12)^2 )

sqrt( 25 + 144 )

sqrt( 169 )

13

D to A:

sqrt( (-2 - (-7))^2 + (1 - (-11))^2 )

sqrt( (5)^2 + (12)^2 )

sqrt( 25 + 144 )

sqrt( 169 )

13

Adding:

13 + 13 + 13 + 13

52

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myrzilka [38]

7.

10% = 6

25% = 15

50% = 30

20% = 12

_____________________

8.

a = 35

b = 105

c = 140

____________________________

9.

15 is 30% of 50.

_____________________________

10.

The punch recipe contains 25% lemonade:

24/6 = x/100

x=1/4 x 100 = 25%

_____________________________

11.

520

multiply 650 by 80 amd then divide by 100

or simply multiply 650 by 0.8

to get 520 students.

_______________________________________

12.

Number of items checked = 300

Defective items = 3%

Number of defective items =

Number of defective items =

Number of defective items = 9

Number of items worked = Total items - Number of defective items

Number of items worked = 300 - 9 = 291

291 items of checked items worked.

8 0
3 years ago
-5(-2) =<br><br> Need help ASAP (too lazy to actually do the work )
just olya [345]
I think the answer is 10
4 0
3 years ago
Read 2 more answers
Maggie is x years old. Her brother Demarco is 4 years older than her. Anna is 3 times as old as Demarco. Write and simplify an e
ExtremeBDS [4]
Maggie = x years old
Demarco = x + 4
Anna = 3*Demarco

Anna = 3*(x + 4)
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Hope this helps!


7 0
3 years ago
Five students ran in their schools field day competition. Chris beat Allie by 7 yards but he was 2 yards behind Elena. Derrick f
anzhelika [568]
From last place to first BART was last the it was DERRICK, ALLIE, and CHRIS and ELENA in first. I hope this helps you! 
4 0
3 years ago
Which is the value of this expression when j=-2
Nuetrik [128]

Answer:

Step-by-step explanation:

(jk^-2/j^-1k^-3)^3

(-2)(-1)^-2

-------------               ^3

(-2)^-1(-1)^-3

switch negative exponenst to other side

(-2)(-2)(-1)^3

__________

(-1)^2

4(-1)

-----

1

= -4

REMEMBER all to the 3rd power!

(-4)^3

-64

3 0
3 years ago
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