Answer:
To find the perimeter of the original rectangle, we first need to find the dimensions of the rectangle.
Let's assume the length of the original rectangle is L cm and the breadth is B cm.
According to the given information, if the length is decreased by 4 cm, the new length becomes (L - 4) cm. Similarly, if the breadth is increased by 2 cm, the new breadth becomes (B + 2) cm.
We are told that this new rectangle with dimensions (L - 4) cm and (B + 2) cm is actually a square with the same area as the original rectangle.
The area of a rectangle is given by length multiplied by breadth. So, the area of the original rectangle is L * B square cm.
The area of the new square is equal to the area of the original rectangle. Therefore, we can set up the equation:
(L - 4) * (B + 2) = L * B
Expanding the equation:
LB - 4B + 2L - 8 = LB
Simplifying the equation:
2L - 4B - 8 = 0
2L = 4B + 8
L = 2B + 4
Now that we have an equation relating the length and breadth of the original rectangle, we can find the perimeter.
The perimeter of a rectangle is given by the formula: 2 * (length + breadth).
Substituting the value of L from the equation above, we get:
Perimeter = 2 * [(2B + 4) + B]
Perimeter = 2 * (3B + 4)
Perimeter = 6B + 8
Therefore, the perimeter of the original rectangle is 6B + 8 cm.
Step-by-step explanation:
–0.67
0.48
0.79
The r-value that represents the strongest correlation is (a) - 0.83
The correlation coefficient has its value to be from -1 to 1
The closer the value to 1 or -1, the stronger the correlation
-0.83 is closer to -1 than the other values closer to 1 or -1
Hence, the r-value that represents the strongest correlation is (a) - 0.83
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Answer:
–0.83
Step-by-step explanation:
In regression analysis, the coefficient of correlation is a statistic which indicates an association between the independent variables and the dependent variable. The coefficient of correlation is represented by "r" and it has a range of -1 to 1. The nearer the r-value to -1 or 1 the better the correlation.
To solve the problem, create the equation 2(x + 2) = 3x - 6. Simplify the equation and solve for x to find the number.
To solve this problem, we can create an equation based on the given information. Let's call the number we're trying to find 'x'. The sum of the number and two can be written as (x + 2). Doubling this expression gives us 2(x + 2). 'Six less than three times the number' can be written as 3x - 6. So, we have the equation 2(x + 2) = 3x - 6. Solving this equation will give us the value of the number 'x'.
Expanding the equation, we get 2x + 4 = 3x - 6. Simplifying it further, we can subtract 2x from both sides to get 4 = x - 6. Adding 6 to both sides gives us 10 = x. Therefore, the number we're looking for is 10.
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