93- 30=63 students likes maths or english or both
42+41=83 likes english or math
but I have only 63 students
83-63=20 students likes both
Answer:
? = 32.20422
Step-by-step explanation:
We know the adjacent side and the hypotenuse
cos ? = adj / hyp
cos ? = 33/39
cos ? = 11/13
Taking the inverse cos of each side
cos ^ -1( cos ?) = cos^-1(11/13)
? = 32.20422
Answer:
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The equation of the level curve described above that contains the points (3,5) is -2u/[u + v]²
<h3>What is the explanation for the above result?</h3>
F(x1, y1) = = √[x² + y²]
contains
f(3, 5)
F(3, 5) = √(3² + 5²)
= √34
= 5.83095
g(u,v) = [u-v]/[u+v]
gu = [(1) (u + v) - (u-v) (1)]/(u+v)²
= 2v/(u+v)²
gv = [(-1) (u + v) - (u-v) (1)]/(u+v)²
= -2u/(u + v)²
Learn more about level curves:
brainly.com/question/18958276
#SPJ4
Full Question:
Find an equation of the level curve of f(x y) = √x² + y² that contains the point (3, 5)