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antiseptic1488 [7]
3 years ago
7

Find the perimeter of quadrilateral (-1, 2) (2, 8), (6, 8) (3, 2). Round answer to nearest hundredth. 2 decimal places.

Mathematics
1 answer:
LenaWriter [7]3 years ago
4 0

Answer:

  21.42

Step-by-step explanation:

The length of the diagonal sides of this parallelogram are given by the distance formula:

  d = √((x2-x1)^2 +(y2 -y1)^2) = √((2-(-1))^2 +(8-2)^2) = √(3^2 +6^2) = 3√5

Of course, the lengths of the horizontal segments are given by the difference in their x-coordinates: 3-(-1) = 4. As with any parallelogram, the perimeter is twice the sum of adjacent side lengths:

  P = 2(d +4) = 2(3√5 +4) = 8 +6√5 ≈ 21.4164

  P ≈ 21.42 units

The perimeter is about 21.42 units.

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LekaFEV [45]
Y = x + 2 is closest to what I believe is the solution.

If the club begins with 2 members, then +2  MUST appear in the formula.

If the club adds 2 members every week, then the total number of members would be

f(x) = y = 2 + 2(x-1), where x is the number of weeks.

Test this:  If x = 1, then y = 2+2(1-1) = 2 + 0  = 2.  This is correct.  The club began with 2 members in week 1

8 0
3 years ago
Read 2 more answers
6x+2y=<br> 6x+2y=<br> \,\,16<br> 16<br> 2x-2y=<br> 2x−2y=<br> \,\,32<br> 32
Ivanshal [37]

Answer:

x = 6, y = -8

Step-by-step explanation:

First we take the equations side by side and put them like this:

 6x + 2y = 16

+ 2x - 2y = 32

8x = 48

Then solve for x.

x = 6

Then insert x back into either equation

2(5) - 2y = 32

10 - 2y = 32

solve for y,

y = -10

3 0
3 years ago
Help, please show how to find x, thank you
Stells [14]
Notice the tickmark on the angles, those angles are equal to each other.

now, notice the angle at the very top, the large triangle is really sharing it with smaller-inscribed triangle, and therefore is equal on both triangles.

therefore, the larger triangle, is similar with smaller-inscribed triangle by AA.

what the dickens does that mean?

\bf \cfrac{large}{small}\qquad \cfrac{4+5}{4}=\cfrac{5+x}{5}\implies \cfrac{9}{4}=\cfrac{5+x}{5}\implies 45=20+4x&#10;\\\\\\&#10;25=4x\implies \cfrac{25}{4}=x\implies 6\frac{1}{4}=x
8 0
3 years ago
A machine worked for 5 hours and used 4 kilowats if electricity. The machine used ------ of a kilowatt each hour it worked.
slega [8]

Answer:

0.8 kilowatt/hour

Step-by-step explanation:

divide 4/5, gives you .

8 0
3 years ago
How do I solve this problem
Rufina [12.5K]
X+5+2x-2+90=180. combine like terms and solve like a normal algebra problem to find x. if you need to find the answer for a certain angle, plug in the value you got for x into one of the angle equations
8 0
3 years ago
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