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Kay [80]
3 years ago
10

Are they similar? Please help, I'm overthinking this problem....​

Mathematics
1 answer:
sveticcg [70]3 years ago
8 0
<h3>Answer: The rectangles are <u>not</u> similar</h3>

========================================================

Explanation:

Divide the vertical sides to get the fraction 18/7

Divide the horizontal sides to get the fraction 30/6

If the rectangles were similar, then 18/7 = 30/6 is a possibility (there's one more possibility but we'll get to it later).

If 18/7 = 30/6 were true, then we should be able to cross multiply and get another true statement. Let's find out

18/7 = 30/6

18*6 = 7*30

108 = 210

We get a false statement, which means the original equation is false.

-----------------------

Now let's say we rotated the bottom rectangle so that the '7's were horizontal and the '6's were vertical. We'll divide the corresponding horizontal sides and vertical sides to get the two fractions of 30/7 and 18/6

Let's see if we have a true equation or not

30/7 = 18/6

30*6 = 7*18

180 = 126

Like before, we end up with a false equation which means the original is false.

No matter how we rotate the rectangles, we do <u>not</u> end up with similar figures.

-----------------------

Here's another way to see we don't have similar rectangles. We'll form the fraction 18/30 based on dividing the vertical and horizontal sides of the upper rectangle. The lower rectangle gives us 7/6

18/30 = 7/6

18*6 = 30*7

108 = 210

This is more evidence that the rectangles aren't similar. The same will happen if we tried 18/30 = 6/7

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Solve for x , 2x-11 -9+ x
romanna [79]
2x - 11
-9 + x
equate the equations
2x - 11 = -9 + x
bring like terms to one side
2x - 11 = -9 + x
- x   +11   +11  - x
-11 and +11 cancels out
+x and -x cancels out
2x - x = 11 - 9
x = 2


3 0
3 years ago
Which expression is equal to
AfilCa [17]

Answer:

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Step-by-step explanation:

multiply the 4's and add the exponents. then divide by 4 and divide by that exponent

3 0
4 years ago
Write the following as an expression: How much water do I need to add to l liters of pure alcohol to obtain a solution of 45% al
vredina [299]

Answer:

see below

Step-by-step explanation:

amount of water w

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total amount of fluid is w+l

(w+l)( .45) = l*.100

Distribute

.45w  + .45 l = 1l

.45 w = 1l - .45l

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3 0
3 years ago
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ASHA 777 [7]

Answer:

\large\boxed{(2x+3)(4x^2-6x+9)}

Step-by-step explanation:

8=2^3\\\\8x^3=2^3x^3=(2x)^3\\\\27=3^3\\\\8x^3+27=(2x)^3+3^3\qquad\text{use}\ a^3+b^3=(a+b)(a^2-ab+b^2)\\\\=(2x+3)\bigg((2x)^2-(2x)(3)+3^2\bigg)=(2x+3)(4x^2-6x+9)

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