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nikklg [1K]
3 years ago
12

For what value of x is quadrilateral CDEF a parallelogram?x=?​

Mathematics
1 answer:
Contact [7]3 years ago
8 0

Answer:

x = 5

Step-by-step explanation:

Since we know that the diagonals bisect each other and divide into equal parts so ➡

x - 2 = 2x -7

2x - x = 7 - 2

x = 5

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What is 66×21? idk help me plz​
Olegator [25]

Answer:

1386

Step-by-step explanation:

If you have trouble with that, you can multiply 66 by 20, then 66*1, and add them (break apart the 21.)

6 0
4 years ago
The figure shows two similar triangles on a coordinate grid: A coordinate grid is shown from positive 6 to negative 6 on the x-a
SIZIF [17.4K]

From what I know, figure ABC has gotten smaller so you wouldn't use either options that suggests a dilation of 3, because that would mean it got bigger. (But please correct me if I'm wrong.) Also, if you look at the little unit square measurements on the graph, looking at figure ABC, C is 6 units from B, while in figure A'B'C', C' is 2 units from B', which 6÷2=3 meaning that A'B'C' would most likely be a third of its size.

Next the figure is being mirrored over the y-axis which is the vertical line going up and down.

So the answer would be the option that says

"Dilation by a scale factor of 1 over 3 followed by a reflection about the y-axis"

I hope that it's right, because I haven't practiced this in a while, and I hope this made some sense.

5 0
3 years ago
Megan has a large packing box shaped as a cube with a volume of 216 cubic feet.
Flura [38]

Answer:

s = 6 feet

Step-by-step explanation:

Given that,

The volume of the cube, V = 216 feet³

We need to find the side length for the cubical box. We know that the volume of the cube is given by :

V=s^3, s is the side length of the box.

So,

s={V}^{1/3}\\\\s={216}^{1/3}\\\\s=6\ feet

So, the side length for the cubical box is equal to 6 feet.

6 0
3 years ago
Simplifying expressions:<br> Simplify 22-5(2x+4)
tangare [24]

22-10x-20

=2-10x

=2(1-5x)

hope this helps.

7 0
3 years ago
Read 2 more answers
I need help on this!
marshall27 [118]
That is a 45 45 90 triangle.
The legs of such a triangle equal the hypotenuse divided by the sq root of 2
So each leg equals 125.5 cm divided by <span> <span> <span> 1.4142135624 </span> </span> </span> which equals
<span> <span> <span> 88.7419010389 </span> </span> </span> or to the nearest 100th of a centimeter:
88.74


3 0
3 years ago
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