Solve.Martha can rake the leaves in her yard in 4 hours. Her younger brother can do the job in 5 hours. How long will it take them to do the job if they work together?
A. 20 hr
B. 
hr
C. 5 hr
D. 
hr
Answer: B
Mathematics
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Subtract.51,163 - 6240
A. 44,623 B. 44,923 C. 48,923 D. 52,743
Mathematics
Find the determinant of the given matrix.
A. -32 B. -400 C. 32 D. 714
Mathematics
Determine whether the graph of the equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.16x2 + y2 = 16
A. y-axis B. x-axis C. origin D. x-axis, y-axis, origin E. none
Mathematics