B=-2 or b=0 is the awnser
Step-by-step explanation:
with reference angle theta
perpendicular (p) = 8
base (b) = 15
hypotenuse (h) = ?
We know by using Pythagoras theorem
h² = p² + b²
h² = 8² + 15²
h² = 64 + 225
h² = 289
h = √289
h = 17
Therefore the missing side is 17.
Now
sin theta = p / h = 8 / 17
cos theta = b / h = 15/17
tan theta = p / b = 8 / 15
Hope this helps.!
After turning 90 degrees from east he is now at SOUTH.
Answer:
Step-by-step explanation:
Total number of questions in the test is 20.
Total number of questions that Alyssa answered correctly is 16.
The percentage of questions that she answered correctly would be
16/20 × 100 = 80%
To get an A, she needs to answer 90% of the questions correctly. Let x represent the number of questions that she needs to answer correctly to get an A. Therefore,
x/20 × 100 = 90
100x = 20 × 90 = 1800
x = 1800/100 = 18
She would need to answer 18 questions correctly to get an A
Alyssa's friend Jessie answered three times more questions correct than incorrect. This means that for every 3 correct answers, she had 1 wrong answer. For 15 correct answers ,she would get 5 wrong answers. Therefore, she got fewer correct answers than Alyssa.
Her percentage is
15/20 × 100 = 75%
Alyssa got a higher percentage of the test questions correct.