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monitta
2 years ago
14

Calculator What is the value of a?

Mathematics
2 answers:
Andrews [41]2 years ago
5 0

Answer:

15

Step-by-step explanation:

20^2 + x^2 = 25^2

= 400 + x^2 = 625

= x^2 = 225

= x = 15

Ede4ka [16]2 years ago
5 0

Answer:

15

Step-by-step explanation:

20^2 + x^2 = 25^2

= 400 + x^2 = 625

= x^2 = 225

= x = 15

You know what to do

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If Pentagon ABCDE was dilated to create Pentagon A'B'C'DE', what rule was used?
svetlana [45]

Answer:

<em>B</em> (x,y) \rightarrow \left(\frac{5}{2}x,\frac{5}{2}y\right)

Step-by-step explanation:

<u>Dilations</u>

Given a point A(x,y) and a scale factor k the dilated image of A, called A' is calculated as A'=(kx,ky), assuming the same scale factor is applied in both axes.

The pentagon ABCDE was dilated to create pentagon A'B'C'D'E'. To find the dilaton rule used, we must find two clear points where the coordinates of both axes can be easily read from the graph.

Point C(-2,0) maps to C'(-5,0). This gives us the scale factor for the x-axis of -5/(-2)= 5/2.

The y-coordinate of E is 2 and the y-coordinate of E' is 5. This gives us the same scale factor for the y-axis of 5/2.

Thus, the rule to dilate the pentagon is:

B \mathbf{(x,y) \rightarrow \left(\frac{5}{2}x,\frac{5}{2}y\right)}

5 0
3 years ago
HELP PLEASE for brainliest!!
marta [7]
-3 • (5x + 2y = 7)
-15x - 6y = -21
-2x + 6y = 9
__________
-17x = -12
x = 12/17
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2y = 7 - 60/17
2y = 3.47
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3 0
3 years ago
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9 Calculator What is the median of the data set? 3, 10, 1, 6, 10, 3, 11, 14<br><br><br><br><br>​
Svetradugi [14.3K]

Answer:

1, 3, 3, 6, 10, 10, 11, 14

(6,10)  6+10= 16  

16/2= 8

median is = 8

Step-by-step explanation:

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2 years ago
The angle which is four times its complement is a. 60 b. 30 C. 45 d. 72​
grigory [225]

Answer:

The answer is D.72°

Step-by-step explanation:

hope this helps.

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2 years ago
What the definition of a fraction?
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A number that is not a whole number.
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3 years ago
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