Simplify using order of operations.42 ÷ (-7) - 9 ÷ (-3)
A. 3
B. -3
C. -9
D. 9
Answer: B
Mathematics
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Find all possible functions with the given derivative.r' = 6 + 
A. r = 6? - 
B. r = 6? - ?4
C. r = 6? + 
D. r = 6? + ?3
Mathematics
Find the standard-form equation of the hyperbola centered at the origin which satisfies the given conditions.Foci at (-5, 0), (5, 0); asymptotes: y = 
x, y = - 
x
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Mathematics
Find the exact value of the expression.cos 45°
A. 
B. 
C. 
D. 
Mathematics
Simplify the expression by rationalizing the denominator.
A. 
B. 
C. 
D. 1
Mathematics