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kozerog [31]
3 years ago
6

What is the value of x?

Mathematics
1 answer:
ryzh [129]3 years ago
8 0

Answer:

Step-by-step explanation:

The top triangle is similar to the whole triangle because of AAA

Then we know that the corresponding sides are similar

9/81=(3x-20)/(3x-20+56)

1/9=(3x-20)/(3x+36)

cross multiply

9(3x-20)=3x+36

27x-180=3x+36

24x=216

x=9

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It is given that,

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The other two types of students are who completed the assignment and did not complete the assignment.

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