Solve the problem.Tracy can wallpaper 5 rooms in a new house in 35 hours. Together with her trainee they can wallpaper the 5 rooms in 19 hours. How long would it take the trainee working by herself to do the job?

A. 75 hr
B. 80 hr
C. 40 hr
D. 35 hr


Answer: C

Mathematics

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Simplify the rational expression.

A.
B.
C.
D.

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Find an equation of variation for the given situation.y varies jointly as x and z and inversely as the product of w and p, and  when    and 

A. y = 
B. y = 
C. y = 
D. y = 37pwxz

Mathematics

y?? ?10y? + 25y = 5, y (0) = ?1, y?(0) = 1

Solve the initial-value problem.

Mathematics

Graph the system of inequalities.4x - y ? -8x + 3y ? 3

A.

B.

C.

D.

Mathematics