Solve and check. Use the square root principle to eliminate the square.(x + 5)2 = 28
A. 2
± 5
B. ±2
C. -5 ± 2
D. -5 ± 2
Answer: D
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The following expressions represent denominators of rational expressions. Find their LCD.r2 + 3r, 4r + 12, and r2 + 6r + 9
A. 4(r + 3) B. 4r(r + 3)2 C. 4(r + 3)2 D. r(r + 3)2
Factor completely.9y4 - 4
A. (3y2 + 2)2 B. (3y2 - 2)2 C. (3y2 + 2)(3y2 - 2) D. (9y2 + 1)(y2 - 4)
Use a common unit right triangle to find the value.sin 30°
A. 
B. 
C. 
D. 
Solve.10,500 college students were asked to name their favorite sport. Of this group, 
said basketball, 
said soccer, 
said baseball, 
said they had no favorite sport, and the remainder said volleyball. How many named each sport? 
A. Basketball: 3,500 Soccer: 2,100 Baseball: 1,800 Volleyball: 2,575 None: 525 B. Basketball: 3,500 Soccer: 2,100 Baseball: 1,750 Volleyball: 2,635 None: 515 C. Basketball: 3,500 Soccer: 2,100 Baseball: 1,750 Volleyball: 2,625 None: 525 D. Basketball: 3,500 Soccer: 2,050 Baseball: 1,750 Volleyball: 2,675 None: 525