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larisa [96]
3 years ago
12

Can anyone help me as soon as possible?

Mathematics
1 answer:
irina1246 [14]3 years ago
3 0

First plot all points as shown in attachment and draw the triangles ABC, XYZ, MNO, JKL and PQR

Now we will do following steps on triangle MNO

(1) Relect it about x axis as shown in second attachment by triangle M'N'O'

(2) Reflect triangle M'N'O' about y axis as shown by triangle M"N"O"

(3) Now translate this triangle M"N"O" as shown by M"'N"'O"'

Since traingle M"'N"'O"' overlaps triangle ABC exactly, so it proves that triangle MNO is congruent to triangle ABC

So triangle MNO can be proved congruent to triangle ABC by sequence of reflection and translation

---------------------------------------------------------------------------------------------------------------

Now can see in third attachment that triangle PQR can be rotated about point Q 90° anticlockwise direction as shown to get triangle P'Q'R' which will exactly overlap triangle JKL. So triangle PQR can be proved congruent to triangle JKL by single rotation.

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x = 7

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In this situation, the hypotenuse is x\sqrt{2} and the legs are both x.So if we look at the hypotenuse, we can tell that x, or the leg of the triangle, is 7.

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5 0
3 years ago
At the city museum, child admission is $6.10 and adult admission is $9.90. On Friday, 142 tickets were sold for a total sales of
antoniya [11.8K]

Answer:

no of child tickets sold were 58

Step-by-step explanation:

Let the number of child ticket sold be x

cost of 1 child ticket = $6.10

Total cost of x child ticket = x*cost of 1 child ticket = = $6.10x

Let the number of adult ticket sold be y

cost of 1 adult ticket = $9.90

Total cost of y adult ticket = y*cost of 1 adult ticket = = $9.90y

Given total ticket sold = 142

Thus,

number of child ticket sold +  number of adult ticket sold = 142

x + y = 142   - equation 1

x = 142 -y  

Total sales of ticket = $1185.40

total sales of ticket  = Total cost of x child ticket + Total cost of x a dult ticket

6.10x + 9.90y = 1185.40

in this equation substituting x = 142 - y from equation 1

6.10(142 - y )  + 9.90y = 1185.40

=>866.2 - 6.10y + 9.90y = 1185.40

=> 3.80y = 1185.40 - 866.2

=> 3.80y = 319.2

=> y = 319.2/3.80 = 84

Thus, y = 84

x = 142 - y  = 142 - 84 = 58

Thus, no of child tickets sold were 58

6 0
3 years ago
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