Solve the problem.One maid can clean the house in 7 hr. Another maid can do the job in 4 hr. How long will it take them to do the job working together?

A.  hr
B. 2 hr
C.  hr
D. 9 hr


Answer: B

Mathematics

You might also like to view...

Solve.--2 = -4x + 10

A. 2 B. 8 C. -2 D. 4

Mathematics

Perform the operation indicated.-  - 

A.
B. - 6
C. - 
D. - 1

Mathematics

Factor completely.144x2 + 24xy + y2

A. (12x - y)2 B. (12x + y)(12x - y) C. (x + 12y)2 D. (12x + y)2

Mathematics

Find an equation in slope-intercept form (where possible) for the line.Through (-11, -1), m = 4

A. y = -4x - 7 B. y = 4x + 43 C. y = -4x - 43 D. y = 4x - 1

Mathematics