Solve, finding all solutions in [0, 2?). Give an exact answer unless indicated otherwise.4.2 cos x + 2.1
= 0
A. 
, 
B. 
, 
C. 
, 
D. 
, 
Answer: D
Mathematics
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Find the angle between the given vectors. Round to the nearest tenth of a degree, if necessary.u = 6i + 4j, v = 2i - 5j
A. 101.9° B. 145.5° C. 55.5° D. 70.8°
Mathematics
Find the solution to the quadratic equation, if they exist.
x²+ 7x+ 10= 0
Mathematics
Solve the problem.Betina Gregory owns municipal bonds valued at $7,900, which is 6% of her total investments. What is the value of her total investments? Round to the nearest dollar.
A. $1,317 B. $474 C. $131,667 D. $47,400
Mathematics
Simplify. Assume that no radicands were formed by raising negative quantities to even powers.
A. b
B. 
C. 
D. 6
Mathematics