Answer:

Step-by-step explanation:

Answer:
would not be helpful to anser nowww... sory!
Step-by-step explanation:
Answer:
43°
Step-by-step explanation:
For triangle ABC:
A = C so all we need to do is to calculate the value of B
The measure of angle ABD is given as 17° so the measure of angle EBC must be 17° as well
Since DBE is an equilateral triangle angle is DBE = 60°
17 + 17 + 60 = 94 this is the measure of angle B
The sum of interior angles in a triangle is equal to 180
A + B + C = 180
A + C + 94 = 180
A + C = 86 since A = C we divide 86 by 2
C = 43°
10)

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12)

13) (your answer is incorrect)

14) (your answer is incorrect)

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16)
-expression to represent this situation

Answer: In 1 group 57 students
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P.S. Hello from Russia :^)