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AlladinOne [14]
3 years ago
13

The side length of a square is represented by the expression x + 5. How could you represent the area of the square? A) 2x + 10 B

) 4x + 20 C) x2 + 5x D) x2 + 10x + 25
Mathematics
2 answers:
Goryan [66]3 years ago
7 0
D is the right answer
Archy [21]3 years ago
5 0

{(x + 5)}^{2}  =  {x}^{2}  + 10x + 25
So D is the right answer
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5000/10000 
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3 years ago
What is the scale factor in the dilation if the coordinates of A prime are (–7, 6) and the coordinates of C prime are (–4, 3)?
olchik [2.2K]

Option A: \frac{1}{3} is the dilation factor

Explanation:

The Coordinates of the square ABCD are A(-21,18), B(-12,18), C(-12,9), D(-21,9)

Also, the coordinates of the square A'B'C'D' are A'(–7, 6), B'(-4,6), C'(-4,3), D'(-8,3)

Now, we shall determine the scale factor in the dilation if the coordinates A' and C'.

Since, the dilation is the enlargement of the image in the same shape but different size.

To determine the scale factor, let us divide A'C' by AC

Thus, we have,

\begin{aligned}A^{\prime} C^{\prime} &=\sqrt{(-4+7)^{2}+(3-6)^{2}} \\&=\sqrt{3^{2}+(-3)^{2}} \\&=\sqrt{9+9} \\&=\sqrt{18}\\&=3\sqrt{2} \end{aligned}

Also,

\begin{aligned}A C &=\sqrt{(-12+21)^{2}+(9-18)^{2}} \\&=\sqrt{9^{2}+(-9)^{2}} \\&=\sqrt{81+81} \\&=\sqrt{162}\\&=9\sqrt{2} \end{aligned}

Dividing A'C' by AC, we have,

\frac{A'C'}{AC} =\frac{3\sqrt{2} }{9\sqrt{2}} =\frac{1}{3}

Thus, \frac{1}{3} is the dilation factor

3 0
3 years ago
Read 2 more answers
5/2x-7=2/4x+14<br><br>a x = -6<br>b x = 6<br>c x = 8<br>d x = 12​
kykrilka [37]
The answer I got was x= 21/2
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Oblicz ułamki 2/8=.../4
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Answer:


Step-by-step explanation:


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