Rationalize the denominator and simplify. Assume that all variables represent positive real numbers.
A. 7 - 
+ 
- 6
B. 7 + 
+ 
+ 6
C. 7 - 
+ 
- 
D. 7 + 
+ 
+ 
Answer: D
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Evaluate the integral by making a substitution and then using a table of integrals.
A. 2 sin-1 
+ C
B. 
+ 2 ln 
+ C
C. 
+ 2 ln 
+ C
D. 
+ 2 sin-1 
+ C
Use problem solving strategies to solve the problem.A mouse is at the bottom of a 10-foot-tall clock. Every hour he climbs up 3 feet. But when the clock strikes at the hour, he falls back 1 foot. If the mouse starts climbing at 8 a.m., at what time to the nearest minute will it reach the top of the clock?
A. 1:00 p.m. B. 12:30 p.m. C. 12:40 p.m. D. 1:10 p.m.
Name the angle in five different ways.
A. Angle EFG, ?EFG, angle E, ?E, or ?GFE B. Angle GFE, ?F, angle EFG, ?EFG, or ?GFE C. Angle GFE, ?GFE, angle EGF, ?EGF, or ?G D. Angle F, angle EFG, angle GEF, ?EFG, or ?F
Solve the system using the inverse of the coefficient matrix of the equivalent matrix equation. 9x + 9y - z = 124 x + 4y - 6z = 23 6x + y + z = 51
A. (7, 2, 7) B. (7, 7, 2) C. (-7, 7, 14) D. No solution