Solve the problem. Express any improper fraction as a whole or mixed number.Martha can rake the leaves in her yard in 6 hours. Her brother can do the job in 7 hours. How long will it take them to do the job working together?
A. 
hr
B. 3
hr
C. 42 hr
D. 
hr
Answer: B
Mathematics
You might also like to view...
Solve the equation.0.43x + 0.4(8,000 – x) = 3350
A. x = 5,000 B. x = 3,000 C. x = –3,000 D. x = 8,000 E. no solution
Mathematics
Find the infinite sum accurate to three decimal places.
A. 1.036 B. 0.972 C. -0.972 D. -1.036
Mathematics
Find the curve y = f(x) in the xy-plane that has the given properties.f(x) has a slope at each point given by - 
and passes through the point 
A. y = 
+ 3
B. y = 
+ 3
C. y = - 
+ 9
D. y = 
+ 3
Mathematics
Perform the indicated operations and simplify the result so there are no quotients.2 tan ? - (1 + tan ?)2
A. - sec2? B. 1 - sin ? C. 0 D. 1
Mathematics