Solve the problem.One maid can clean the house in 6 hours. Another maid can do the job in 8 hours. How long will it take them to do the job working together?
A. 
hr
B. 
hr
C. 
hr
D. 
hr
Answer: B
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Which of the following does not represent the concept of surface area? ?
A. ?The visible surface you can see. B. ?The area of each visible surface. C. ?The space the shape takes up. D. ?S = 2wl + 2wh + 2lh E. S = 2(wh + wl + hl)?
The function f is one-to-one. State the domain and the range of f and f-1. Write the domain and range in set-builder notation.f(x) = 
A. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
B. f(x): D = 
, R = 
;
f-1(x): D is all real numbers, R = 
C. f(x): D = 
, R is all real numbers;
f-1(x): D is all real numbers, R = 
D. f(x): D = 
, R = 
;
f-1(x): D = 
, R = 
Express the rational expression in lowest terms.
A. 
B. 
C. 
D. 
Use the Pythagorean theorem to find the unknown side of the right triangle.
A. 11 B. 15 C. 14 D. 12