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Nastasia [14]
2 years ago
11

What is the value of x? Enter your answer in the box. x =

Mathematics
1 answer:
konstantin123 [22]2 years ago
5 0
To get the answer for this question is to: 

Divide 56 by 72 = 0.777777778 because 0.777777778 * 72 = 56 cm. 

Since 72 cm is related to the side length of 9 cm, take 0.777777778 and multiply it by 9 and you will get 7 for the missing side length. 

To get the value of X for the equation to equal 7, take the 7 you got for the missing side length and add it to 20 to get 27 (20 + 7 = 27). Then, take the 27 and divide it by the 3, and you will get 9 for X. 

Example: 
7 + 20 = 27 
27 / 3 = X 
9 = 9

&

3x - 20 
= 3(9) - 20 
= 27 - 20 
= 7 

The correct answer for the value of X is: 9 

Hope this helps! 

<em>~ ShadowXReaper069</em>
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5 0
2 years ago
David bought 3 dvds and 4 books for $40 at a yard sale. Anna bought 1 dvd and 6 books for $18. How much did each dvd and book co
Ber [7]

Answer:

A book is worth $1 and a DVD is worth $12.

Step-by-step explanation:

The equations (2 unknowns and two equations, d is for a DVD and b is for a book):

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For Anna: d+6b=18

Now multiply the second equation with -3 and add to the first equation:

3d+4b=40

−3d−18b=−54

Combined equation: −14b=−14 and b=1 (means that each book is worth $1).

 

Now for DVD price, use the second equation:

d=18−6 or d=12 (means that each DVD  is worth $12).

A book is worth $1 and a DVD is worth $12.

8 0
3 years ago
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Answer

$540

Step-by-step explanation:

hopes this helps

8 0
2 years ago
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