Alex borrowed $12.50 from his friend Danilo. He paid him back $8.75. How much does he still owe?
2 answers:
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Answer:
Step-by-step explanation:
we know that
An exterior angle of a triangle is equal to the sum of the opposite interior angles.
see the attached figure to better understand the problem
so
∠DEF=∠ECD+∠CDE
substitute the given values
solve for x
Combine like terms
Group terms
Find the measure of angle CDE
substitute the value of x
Answer: 5
Step-by-step explanation:
The degree is . Setting this equal to 10, we get m = 5.