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Allushta [10]
3 years ago
9

PLEASE I NEED HELP!! what are two ways that you can tell that two ratios form a proportion? i really need to pass this test to g

et my grades up, I'm not trying to cry my whole winter break.​
Mathematics
2 answers:
Rashid [163]3 years ago
7 0

Answer:

A proportion is simply a statement that two ratios are equal. It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. Ratios are proportional if they represent the same relationship. One way to see if two ratios are proportional is to write them as fraction in it’s simplest form. Another way is to see if the numbers in the ratios are factors or multiples of each other. For example, 10:5 and 30:15. 10:15= 10/5 and 30:15= 30/15. Then you put it in simple form. 10/5 = 2 and

30/15 = 2. Therefore 10:5 and 30:15 are proportional.

Hope this helps :)

ioda3 years ago
6 0

Answer:

A proportion is simply a statement that two ratios are equal. It can be written in two ways: as two equal fractions a/b = c/d; or using a colon, a:b = c:d. The following proportion is read as "twenty is to twenty-five as four is to five."

Step-by-step explanation:

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Which shapes can the composite figure be divided into to find the area​
icang [17]

Given:

Composite figure

To find:

The shapes in the composite figure.

Solution:

The image splitted into three shapes.

  • Draw a line from top vertex to bottom vertex.
  • We get one triangle.
  • Similarly, draw another line adjacent to the previous line.
  • We get another triangle and rectangle.

Therefore a composite figure divided into a rectangle and two triangles.

4 0
3 years ago
Simplify each expressionplease be sepific to <br><br> 7(3x + 5y) =
anyanavicka [17]

Answer:

21x+35y

Step-by-step explanation:

7*3x+7*5

21x+35y

7 0
3 years ago
Find the equation of the sphere if one of its diameters has endpoints (-8, -3, -10) and (-6, 1, -4) which has been normalized so
alex41 [277]

Answer:

The  equation is  x^2 + y^2    +z^2 + 14 x  + 3y \ + 14z  + 86.25=0

Step-by-step explanation:

From the question we are told that  

    The  diameter endpoints is   (-8, -3, -10) and (-6, 1, -4)

Generally the equation of a sphere with center coordinates (a, b , c ) and  radius  r   is mathematically represented as

           (x -  a )^2  + (y -b )^2  + (z -c)^2 =  r^2

Now since we are given the endpoints of the diameter then we can obtain the center coordinates as follows

         (a, b , c) =  [ \frac{ -8 +(-6)}{2}  ,  \frac{-3 + (1)}{ 2}  , \frac{ -10 + (-4)}{2} ]

         (a, b , c) =  [ -7 ,  -1.5  , -7 ]

Now the length of the diameter is evaluated as

    |d| =  \sqrt{ (-8 - (-6 ))^2 + ( -3 - (1) )^2 + ( -10 - (-4))^2 }

   |d| =  \sqrt{56 }

   |d| =   \sqrt{4 *  14 }

   |d| = 2  \sqrt{  14 }

Now the radius is mathematically represented as

    r = \frac{|d|}{2}

    r = \frac{ 2 \sqrt{14} }{2}

    r =  \sqrt{14}

So

   (x -  -7 )^2  + (y --1.5 )^2  + (z --7)^2 = ( \sqrt{14} )^2

   (x +7 )^2  + (y +1.5 )^2  + (z +7)^2 = 14

    x^2 + 14 x + 49  + y^2 + 3y + 2.25   +z^2 14z + 49 = 14

    x^2 + y^2    +z^2 + 14 x  + 3y \ + 14z  + 86.25=0

4 0
4 years ago
Solve the equation by factoring. c2 − 4c = 0
TiliK225 [7]

Hey there!!

Given :-

... c² - 4c = 0

... c ( c - 4 ) = 0

... c - 4 = 0

... c = 4

<em>The value of c is '4'. </em>

Hope my answer helps!!

5 0
3 years ago
Read 2 more answers
Ryan bought a pack of gum for $0.89, a soda for $1.39, and a donut for $0.75 from the convenience store. How much was his total?
masha68 [24]
Answer would be: A. $ 3.03
3 0
4 years ago
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