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katovenus [111]
3 years ago
14

Make a conjecture. How could the distance formula and slope be used to classify triangles and quadrilaterals in the coordinate p

lane? Check all that apply.
Mathematics
1 answer:
Alexeev081 [22]3 years ago
7 0
 the distance formula to find the length of the sides... opposite sides equal it could be a rectangle or parallelogram all sides equal, square or rhombus adjacent equal, kite and then the slope is used to check angles if the product of the 2 lines in -1 the lines are perpendicular (right angle) the the slopes of 2 lines are the same the sides are parallel.    

I think this is it ^_^
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How can estimating be helpful
nadezda [96]
It helps you narrow down to a smaller answer for example there is pi, (3.14159265359) and there is more and more to that number. It is now estimated to 3.14 because it would be almost impossible to work with pi if it wasn't estimated
6 0
3 years ago
7 is what percentage of 14?<br> 50%<br> 25%<br> 10%<br> 75%
Doss [256]
7 is 50% of 14 because 2 times 7=14 and 50 times 2=100
3 0
3 years ago
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For each function below, find its domain and then determine if the function increasing, decreasing, or constant on each piece of
VashaNatasha [74]

Answer:

Domain:  all real numbers

The interval on which the function is increasing is : (0 , infinity)

The interval on which the function is decreasing is : (-infinity , 0)

The interval on which the function is constant is : ( 0,0 )

Step-by-step explanation:

f(r)=5r^2−4

This is  a quadratic function.

vertex at  (0, -4)  and with positive coefficient for r^2

The interval on which the function is increasing is : (0 , infinity)

The interval on which the function is decreasing is : (-infinity , 0)

The interval on which the function is constant is : ( 0,0 )

8 0
4 years ago
The top and bottom margins of a poster 6 cm each, and the side margins are 4 cm each. If the area of the printed material on the
Serga [27]

Answer:

p = 25,20 cm

h = 34,32 cm

A(min) = 864,86 cm²

Step-by-step explanation:

Let call p and h dimensions of a poster, ( length , and height respectively) and x and y  dimensions of the printed area of the poster then

p = x + 8        and      h = y + 12

Printed area = A(p) = 384 cm²     and   A(p) = x*y     ⇒ y = A(p)/x

y = 384 / x

Poster area  =  A(t) = ( x + 8 ) * ( y + 12 ) ⇒ A(t) =  ( x + 8 ) * [( 384/x ) + 12 ]

A(t)  =  384 + 12x + 3072/x + 96      A(t) = 480 + 3072/x + 12x

A(t)  =  [480x + 12x² + 3072 ] / x

A´(t) =  [(480 + 24x )* x  - (480x + 12x² + 3072]/x²

A´(t) =  0         [(480 + 24x )* x  - 480x - 12x² - 3072] =0

480x + 24x² -480x -12x² - 3072 = 0

12x² = 3072         x² = 296

x = 17,20 cm       and      y =  384/17,20      y = 22,32 cm

Notice  if you substitu the value of x = 17,20 in A(t) ; A(t) >0 so we have a minimun at that point

Then dimensions of the poster

p = 17,20 + 8  = 25,20 cm

h = 22.32 + 12 =34,32 cm

A(min) = 25,20 *34.32  

A(min) = 864,86 cm²

7 0
3 years ago
The area of a circular base of the larger cylinder is 81 pie
gayaneshka [121]

Answer:

The dimensions of the larger cylinder are 3 times  the dimensions of the smaller cylinder

The surface area of the larger cylinder is 3^2. or 9 times the surface area of the smaller cylinder

If proportional dimensional changes are made to a  solid figure, then the surface area will change by  the square of the scale factor of similar solids

Step-by-step explanation:

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x ----> the area of the base of larger cylinder

y --->  the area of the base of smaller cylinder

so

z^{2} =\frac{x}{y}

we have

x=81\pi\ units^2

y=9\pi\ units^2

substitute

z^{2} =\frac{81\pi}{9\pi}

solve for z

z^2=9\\z=3

<u><em>Verify each statement</em></u>

1) The dimensions of the larger cylinder are 3 times  the dimensions of the smaller cylinder

The statement is true

Because the scale factor is equal to 3 ( see the explanation)

2) The surface area of the larger cylinder is 3^2. or 9 times the surface area of the smaller cylinder

The statement is true

Because, the surface area of the larger cylinder is equal to the surface area of the smaller cylinder multiplied by the scale factor squared

3) If proportional dimensional changes are made to a  solid figure, then the surface area will change by  the square of the scale factor of similar solids

The statement is true

because

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

8 0
3 years ago
Read 2 more answers
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