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3 years ago

A polygon has vertices at (-1,1), (1,1), (1,-1) & (-1,-1) what is the perimeter in units of the polygon

Mathematics

1 answer:

sukhopar [10]3 years ago

5 0

Answer:

Step-by-step explanation:

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28/z- z/4+1 1/8 when z =4

Paha777 [63]

Answer:

7 1/8 or 7.125

Step-by-step explanation:

first subsitute z for 4

28/4 - 4/4 + 1 1/8

then do 28/4 - 4/4 which is 6,

add that to 1 1/8

and get 7 1/8

5 0

3 years ago

Read 2 more answers

Find the value of x such that the area of a triangle whose vertices have coordinates (6, 5), (8, 2) and (x, 11) is 15 square uni

Serjik [45]

Answer:

$x =12\ or\ -8$

Step-by-step explanation:

Given

$(x_1,y_1) = (6,5)$

$(x_2,y_2) = (8,2)$

$(x_3,y_3) = (x,11)$

$Area = 15$

Required

Find x

The area is calculated as thus:

$Area = \frac{1}{2}|x_1(y_2 - y_3) + x_2(y_3 - y_1) + x_3(y_1 - y_2)|$

Substitute values

$15 = \frac{1}{2}|6*(2 - 11) + 8*(11 - 5) + x(5 - 2)|$

$15 = \frac{1}{2}|6*(-9) + 8*(6) + x(3)|$

$15 = \frac{1}{2}|-54 + 48 + 3x|$

$15 = \frac{1}{2}|-6 + 3x|$

Multiply through by 2

$2 * 15 = \frac{1}{2}|-6 + 3x| * 2$

$30 = |-6 + 3x|$

Remove absolute sign

$30 = -6 + 3x\ or\ -30 = -6 + 3x$

Add 6 to both sides

$36 = 3x\ or\ -24 = 3x$

Divide by 3

$12 = x\ or\ -8 = x$

$x =12\ or\ -8$

<em>So, the coordinates are (-8, 11) or (12,11)</em>

3 0

2 years ago

The number shown above belongs to which of the following subsets of the real numbers?

Nookie1986 [14]

Answer:

Rational

Step-by-step explanation:

the rational number subset contains fractions

3 0

3 years ago

Read 2 more answers

When rounded, what is the value of the 6 in 4.769

levacccp [35]

If u round tha to the nearest 10th it’s 4.8

7 0

3 years ago

Find the interval(s) over which the function is decreasing

son4ous [18]

Answer : (0,3) U (3, ∞)

We need to find the interval(s) over which the function is decreasing

We look at the intervals of x where the graph is decreasing

Decreasing interval of the graph is the part where the graph goes down

We look at the part where the graph changes direction

In the middle inverted U shaped graph , the graph changes direction and start decreasing at x=0

the graph is decreasing till x=3

so first decreasing interval is x=0 to 3. we write it as (0,3)

After x=3 the graph starts decreasing and it goes to infinity

So the second decreasing interval is 3 to infinity . We write it as (3, ∞)

Now combine both intervals by a 'U' union

(0,3) U (3, ∞)

7 0

3 years ago