You can't deduce the length of a side from the perimeters of a rectangle.
Say that and
are, respectively, the short and long side of the rectangle.
So, we know that
But we can't solve exactly for nor for
, unless more information is given.
PLEASE HELP!!!!!! The length of a rectangle is three times its width. If the perimeter of the rectangle is 56 cm, find its area.
1 answer:
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Answer:
2 x
Step-by-step explanation:
The diagonal divides the square into 2 right angles with legs s and hypotenuse x
Using Pythagoras' identity on one of the right triangles, then
s² + s² = x²
2s² = x² ( divide both sides by 2 )
s² = ( take the square root of both sides )
s = =
Thus
perimeter = 4s = 4 × =
Multiply numerator/ denominator by
perimeter = = 2
x
Answer:
C
Step-by-step explanation:
This is a linear equation in one variable and has 1 solution
12x + 6 = 5x ( subtract 5x from both sides )
7x + 6 = 0 ( subtract 6 from both sides )
7x = - 6 ( divide both sides by 7 )
x = - ← 1 solution