Find the sum of the series.
A. 21
B. 12
C. 42
D. 23
Answer: A
Mathematics
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Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse with intercepts (±9, 0) and (0, ±8)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve the inequality. Give the solution set in both set-builder notation and graph form.3 ? 6x + 9 and 2x + 4 < 10
A. 
B. 
C. 
D. 
Mathematics
Use analytical methods to solve the equation.1 - 
= 
A. 2
B. 
C. - 
D. -2
Mathematics
Solve the equation for solutions in the interval [0°, 360°).sin 2? = cos ?
A. ? = 0°, 120°, 180°, 240° B. ? = 105°, 165°, 285°, 345° C. ? = 15°, 165°, 195°, 345° D. ? = 30°, 90°, 150°, 270°
Mathematics