Answer:
6 meters by 9 meters
Step-by-step explanation:
<u><em>Step 1: Formula for perimeter of rectangle</em></u>
Rectangle's perimeter = 2 (length) + 2 (width)
Rectangle's perimeter = 2 (length + width)
<u><em>Step 2: Find the length and width in terms of x</em></u>
Width = x
Length = 1.5 times width
Length = 1.5x
<u><em>Step 3: Find x</em></u>
Perimeter = 2(length + width)
30 = 2 (1.5x + x)
30/2 = 2.5x
15/2.5 = x
x = 6
<u><em>Step 4: Find the length and width</em></u>
Width = x = 6 meters
Length = 1.5x = 1.5(6) = 9 meters
Therefore, the dimensions of the room are 6 meters and 9 meters.
Your answer will be letter b
Answer:
Prove set equality by showing that for any element , if and only if .
Example:
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Step-by-step explanation:
Proof for for any element :
Assume that . Thus, and .
Since , either or (or both.)
- If , then combined with , .
- Similarly, if , then combined with , .
Thus, either or (or both.)
Therefore, as required.
Proof for :
Assume that . Thus, either or (or both.)
- If , then and . Notice that since the contrapositive of that statement, , is true. Therefore, and thus .
- Otherwise, if , then and . Similarly, implies . Therefore, .
Either way, .
Therefore, implies , as required.