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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.
Hey there!
3/7 is needed for 1 cake
If she needs to make 42 cakes, then multiply the amount for 1 by 42
42 × 3/7 = 126/7 = 18
She needs 18 kilograms of flour to make 42 cakes
Hope this helps :)
Answer:
0, -1
Step-by-step explanation:
This question was answered in another place since you asked it twice. Please refer to the other place that you asked the same question.
Answer:
Step-by-step explanation:
Given: 
We need to completely isolate 
to solve.
Finally, multiply both sides by -2 to completely isolate .
The answer for your question is going to be. 2^((3)/(2)) I know this cause I just took a quiz with this question on it
