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AnnyKZ [126]
3 years ago
13

How do i find the perimeter of this polygon?

Mathematics
2 answers:
alisha [4.7K]3 years ago
7 0
Perimeter = sum of all sides
so
P = 9 + 5 + 11 = 25
answer 25 cm
SCORPION-xisa [38]3 years ago
4 0
Well if it's supposed to be a right triangle the answer is 28.08 but it is a normal triangle the answer is 25 cm
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Which system of equations is consistent and dependent?
MAXImum [283]

Answer:

Step-by-step explanation:

4x − y = −11

2x + 3y = 5

lets multiply the second equation by -2 and add it to the first:

4x − y = −11

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------------------

0  - 7y = -21

y = -21/-7

y = 3

now we substitute this result in the first equation to find x:

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we solve for y

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2y = −6

we solve for y:

2y = −6

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we do substitute in the first equation:

4x + 3y = 5

4x + 3(-3) = 5

4x - 9 = 5

4x = 14

x = 14/4

x = 7/2

so the solution is x = 7/2 and y = -3

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we solve for x:

9x = −6

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x = -2/3

then we substitute in the first equation the result found:

7x − 3y = −11

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we multiply by 3 to eliminate fractions:

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9y = 19

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14x = −28

x = -28/14

x = -2

then we substitute in the first equation:

12x − 3y = −33

12(-2) − 3y = −33

-24 - 3y = -33

3y = 9

y = 3

then the solution is x = -2 and y = 3

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Answer:

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