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Nadusha1986 [10]
2 years ago
10

The coordinates of the vertices of a polygon are (-2, 1). (-3, 3), (-1, 5), (2, 4), and (2, 1). What is the perimeter of the pol

ygon to the nearest tenth of a unit.
Do not label your answer. Answer with a number only.

Mathematics
1 answer:
Marysya12 [62]2 years ago
6 0

Answer:

<u>Perimeter </u>

\bf \boxed{7+\sqrt{5}+\sqrt{8}+\sqrt{10}}

Step-by-step explanation:

Draw the polygon to have an idea of what you are being asked.

<h3>See picture attached </h3>

Now find the length of each side and add them up, that is the perimeter.

To find the length of a side use the formula of the distance between to points (a,b) and (c,d)

\bf \sqrt{(a-c)^2+(b-d)^2}

<u>Distance between (-2,1) and (-3,3) </u>

\bf \sqrt{(-2-(-3))^2+(1-3)^2}=\sqrt{5}

<u>Distance between  (-3,3) and (-1,5) </u>

\bf \sqrt{(-3-(-1))^2+(3-5)^2}=\sqrt{8}

<u>Distance between  (-1,5) and (2,4) </u>

\bf \sqrt{(-1-2)^2+(5-4)^2}=\sqrt{10}

<u>Distance between (2,4) and (2,1) (obviously 3) </u>

\bf \sqrt{(2-2)^2+(4-1)^2}=3

<u>Distance between (2,1) and (-2,1) (obviously 4) </u>

\bf \sqrt{(-2-2)^2+(1-1)^2}=4

Add up all the lengths

\bf \sqrt{5}+\sqrt{8}+\sqrt{10}+3+4

<u>Perimeter </u>

\bf \boxed{7+\sqrt{5}+\sqrt{8}+\sqrt{10}}

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Vikentia [17]

Irrational

\sqrt{2}

\sqrt{3}

Rational:

\sqrt{1}

\sqrt{4}


6 0
3 years ago
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Jan wants to build a circular pond in his backyard. On the blueprint, the diameter of the pond is 15.5 in. The blueprint has a s
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Answer:

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Step-by-step explanation:

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3 years ago
Which equation represents a nonlinear function? y=−85x+19.4 y = − − 8 5 x + 19.4 y=−12x2−7 y = − − 1 2 x 2 − − 7 y=x4+x y = x 4
Pavel [41]

Answer:

The answer is below.

Step-by-step explanation:

The options are not clear. I would solve a similar question.

A linear function is a function in the form:

y = mx + b;  where y and x are variables, m is the slope and b is the y intercept.

From the options:

a) x(y - 5) = 2

xy - 5x = 2.   Since the equation is not in the form of y = mx + b, hence it is not a linear function. It is a nonlinear function.

b) y - 2(x + 9) = 0

y - 2x - 18 = 0

y = 2x + 18. The equation is in the form of y = mx + b, hence it is a linear function.

c) 3y + 6(2 - x) = 5

3y + 12 - 6x = 5

3y = 6x - 7. The equation is in the form of y = mx + b, hence it is a linear function.

d) 2(y + x) = 0

2y + 2x = 0

2y = -2x. The equation is in the form of y = mx + b, hence it is a linear function.

4 0
2 years ago
Nick was surveying his field and saw some cows and ducks. Nick counted a total of 80 heads and
Natali [406]

Answers:

  • Total equation:  x+y = 80
  • Legs equation:  2x+4y = 248
  • How many ducks? 36
  • How many cows? 44

====================================================

Further explanation:

  • x = number of ducks
  • y = number of cows

x+y = 80 is the total equation (ie the head count equation) since we assume each animal has 1 head, and there are 80 heads total.

That equation can be solved to y = 80-x after subtracting x from both sides.

The legs equation is 2x+4y = 248 because...

  • 2x = number of legs from all the ducks only
  • 4y = number of legs from all the cows only
  • 2x+4y = total number of legs from both types of animals combined

We're told there are 248 legs overall, so that's how we ended up with 2x+4y = 248

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

Let's plug y = 80-x into the second equation and solve for x.

2x+4y = 248

2x+4( y ) = 248

2x+4( 80-x ) = 248

2x+320-4x = 248

-2x+320 = 248

-2x = 248-320

-2x = -72

x = -72/(-2)

x = 36

There are 36 ducks

Now use this x value to find y

y = 80-x

y = 80-36

y = 44

There are 44 cows.

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

Check:

36 ducks + 44 cows = 80 animals total

36*2 + 44*4 = 72 + 176 = 248 legs total

The answers are confirmed.

5 0
2 years ago
Okay, someone please answer, this is due today- im going to cry, nobody is willing to help me so please someone who knows answer
kotegsom [21]

Answer:

draw a number line from 66 to 81

make your minimum 67

lower quartile should be on 70

the median on 77

upper quartile and maximum on 80

(note that your upper quartile and maximum is both on 80 so there won't be an extension as you normally would see on a box plot)

You can search up "box plot" and go on images to see what i mean

(copy and pasted from your last post!)

Step-by-step explanation:

I can probably help on part 4 and send a sketch but I currently can't use my phone to send a pic and I am currently on my desktop :'(

I rlly hope you do well! Don't lose hope! <3

(also like ur pfp, i enjoyed the anime too ahehe)

7 0
2 years ago
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