Hello,
A: True (4 sides equals in a square)
B: True all rectangle has a symetry centre
C: True (2 sides // in a rhombuse since is a parallelogram)
D:False
<h3>
Answer:</h3>
x² -6x = -13 ⇒ x ∈ {3-2i, 2+2i}
<h3>
Step-by-step explanation:</h3>
To make a=1, divide the equation by the coefficient of x², which is 8.
... x² -6x = -13 . . . . . . your blanks are filled with -6 and -13
Now, to complete the square, add the square of half the x-coefficient:
... (-6/2)² = 9.
... x² -6x +9 = -4 . . . 9 added to both sides
... (x -3)² = -4 . . . . . rewrite as a square
... x -3 = ±2i . . . . . . take the square root
... x = 3 ±2i . . . . . . . add 3
The solutions are the complex numbers x = 3 ±2i.
Answer:
a ≥ 3
Step-by-step explanation:
8 x 6 = 48 (regularly you’d divide by two but this is on both sides so we’ll leave it)
4 x 10 = 40 / 2 = 20
6 x 4 = 24 / 2 = 12
8 x 4 = 32 / 2 = 16
48 + 20 + 12 + 16 = 96
hope that helps! message me with any questions on other problems.