9514 1404 393
Answer:
(a) 42.3°
Step-by-step explanation:
Side 'a' is the shortest of three unequal sides, so angle A will be the smallest angle in the triangle. Its measure can be found from the Law of Cosines.
a² = b² +c² -2bc·cos(A)
cos(A) = (b² +c² -a²)/(2bc) = (21² +25² -17²)/(2·21·25) = 777/1050
A = arccos(777/1050) ≈ 42.3°
The measure of angle A is about 42.3°.
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<u><em>Additional comment</em></u>
The smallest angle in a triangle can never be greater than 60°. This lets you eliminate choices that exceed that value.
Answer:

Step-by-step explanation:
This is the answer because:
1) 185 equals to
because 18% is equal to 0.18 which is
2)
to it's lowest terms is 
3) It's lowest terms is
because 18/2 is 9 and 100/2 is 50
4)
can't be simplified any further because 9 and 50 don't have any common factors
Hope this helps! :D
Answer:
Is there an image?
Step-by-step explanation:
Step-by-step explanation:
-7(y-1)= 21
-7y+7=21
-7y=21-7
-7y=14
divide by-7
y=-2