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igor_vitrenko [27]
3 years ago
10

Is 12/42=10/35 a true proportion

Mathematics
1 answer:
olya-2409 [2.1K]3 years ago
3 0
Yes, they both are 2/7

Proof: Left-hand side

Simplify the following:
12/42

The gcd of 12 and 42 is 6, so 12/42 = (6×2)/(6×7) = 6/6×2/7 = 2/7:
Answer:  2/7
Right-hand side:

Simplify the following:
10/35
The gcd of 10 and 35 is 5, so 10/35 = (5×2)/(5×7) = 5/5×2/7 = 2/7:
Answer:  2/7
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Yeah i dont understand this-
Katyanochek1 [597]
You know each side is 9 meters long, meaning it’s a square. To find perimeter, add up all the sides aka. 9+9+9+9=36. To find the area, multiply one side by the other aka. 9x9 = 81.
7 0
2 years ago
Read 2 more answers
Drag each expression to show whether it is equivalent to 36x + 9, 9(4x – 1), or (4 • 9x) + (4 • 2).
lora16 [44]
In order to find out what 36x + 9 is equivalent to,, we must factor out 9 from the expression. Once we do this you will find that this expression is equivalent to 9(4x + 1),, or option E.
Next we will look at the expression 9(4x -1). In order for us to find out the equivalent to this expression,, we must first multiply each term in the parenthesis by 9. 
9 × 4x - 9
Now calculate the product
36x - 9
This means that the equivalent for this expression is 36x - 9,, or option A.
Lastly,, we will look at the final expression given which is 4(9x + 2). The first step for finding the equivalent of this expression is to multiply the numbers in the first parenthesis together.
(36x) + (4 × 2)
Now multiply the numbers in the second parenthesis together.
(36x) + 8
Remove the parenthesis
36x + 8
Now factor out 4 from the expression to get your final answer.
4(9x + 2)
This means that the last expression is equivalent to 4(9x + 2),, or option C.
Let me know if you have any further questions
:)
3 0
3 years ago
4. – 2y = -5<br>10.x + 20y = -2​
kari74 [83]

Answer:

10 • (x - 2y + 3z)

? if thats the answer.

and   y = 5/2 = 2.500 for the - 2y = -5 one. if they are both combined please comment under mine.

4 0
3 years ago
Pls tell me the answer with the work shown
shepuryov [24]

Answer:

plug in the numbers for radius, and know your formulas. a diameter is 2 times a radius so

Pi or 3.14 times D is the same as 2 times pi times radius.

4 0
3 years ago
The length around a rectangle
USPshnik [31]
Perimeter is the length around an object

8 0
2 years ago
Read 2 more answers
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