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weeeeeb [17]
3 years ago
5

Does anyone have a brief explanation on how to solve proportions?

Mathematics
2 answers:
denpristay [2]3 years ago
4 0

1) cross-multiplication: \frac{x}{y} = \frac{a}{b} -> xb = ay

2) common denominator: x/y = a/b -> xb/yb = ya/yb

Cross multiplication is the easiest.

agasfer [191]3 years ago
3 0

Answer:

cross mulitply and then divide

Step-by-step explanation:

In your proportion you will have 3 of the 4 numbers such as 3/7=9/x.  Mulitply the nubers that are diagonal (cross) from each other.  Here it is the 7 and 9 so 7x9 = 63.  Then you will divide that answer by the number that you haven't used yet, here that is the 3.   So 63/3=21.  x=21.  Works all the time.

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Find VW please. the picture is below
sergejj [24]

Answer:

VW = 44

Step-by-step explanation:

the line VX is parallel to ZY and intersects the other 2 sides of the triangle then it divides those sides proportionally , that is

\frac{ZV}{VW} = \frac{YX}{XW} ( substitute values )

\frac{22}{VW} = \frac{18}{36} = \frac{1}{2} ( cross- multiply )

VW = 2 × 22 = 44

3 0
2 years ago
△ABC ≅ △DEF, EF = x 2 - 7, and BC = 4x - 2.
Artist 52 [7]

Answer:

Therefore the value of x is 5.

Step-by-step explanation:

Given:

△ABC ≅ △DEF,

EF = x 2 - 7, and

BC = 4x - 2.

To Find:

the values of x. = ?

Solution:

△ABC ≅ △DEF      ........Given

If two Triangles are congruent then the Corresponding Parts of Congruent Triangles are Congruent.

∴ BC ≅ EF   ...................CPCTC

Substituting the values we get

4x-2=x^{2}-7\\x^{2}-4x-5=0

Now By Factorizing we get

x^{2}-5x+x-5=0\\x(x-5)+1(x-5)=0\\(x+1)(x-5)=0\\x+1=0\ or\ x-5=0\\x=-1\ or\ x=5\\x\ cannot\ be\ negative\\\therefore x=5

Therefore the value of x is 5.

8 0
4 years ago
Is (ab^2) equivalent to ab^2? Explain.
Zarrin [17]

Answer: yes it is equivalent!

Step-by-step explanation:

all you do is take away the parentheses and then it is the same exact thing!

6 0
3 years ago
Read 2 more answers
What Typographic grid?
ahrayia [7]

Answer:

A typographic grid shows the area of the store.

Step-by-step explanation:

3 0
4 years ago
FIRST ONE TO GET ME THE CORRECT ANSWER WILL WIN BRAINIEST
Dafna11 [192]

9514 1404 393

Answer:

  59 3/4

Step-by-step explanation:

The change from the opening price is ...

  -50 1/2 +110 1/4 = 60 -1/4 = 59 3/4 . . . change from opening price

3 0
3 years ago
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