Find the exact value. cos85° cos40° + sin85° sin40°
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Mathematics
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Find the missing value and write a conclusion.35% of 600 is what number?
A. 35% of 600 is 210. B. 35% of 600 is 2100. C. 35% of 600 is 21. D. 35% of 600 is 2.1.
Mathematics
(2x - y)(x + 3y) =
a. 2x2 + 5xy - 3y2 b. 2x2 + 7xy + 3y2 c. 2x2 - 7xy + 3y2 d. 2x2 + 7xy + 3x2 e. 2x2 + 2xy - 3y2
Mathematics
Solve using the multiplication principle.-2 = 
a
A. -18 B. 6 C. -1 D. 7
Mathematics
Find the foci of the given hyperbola.25x2 - y2 = 25
A. (0, 
), (0, -
)
B. (5, 0), (-5, 0)
C. (
, 0), (-
, 0)
D. (0, 5), (0, -5)
Mathematics