Solve the problem.Bob can overhaul a boat's diesel inboard engine in 15 hours. His apprentice takes 30 hours to do the same job. How long would it take them working together assuming no gain or loss in efficiency?

A. 6 hr
B. 45 hr
C. 4 hr
D. 10 hr


Answer: D

Mathematics

You might also like to view...

Find the indicated quantities for the appropriate arithmetic sequence.A rose garden has 16 bushes in one row, 13 bushes in the next row, then 10, and so on. If there are 51 bushes in the garden, in how many rows are they planted?

A. 3 B. 7 C. 6 D. 5

Mathematics

Solve the equation.6 - (x - 3) = -4x + 3(x + 5)

A.
B.
C. ?
D. {all real numbers}

Mathematics

Solve the application.To obtain a certain shade of paint, Peter mixed 2 gallons of white paint with 6 gallons of brown and 2 gallons of blue paint. How much paint did he have?

A. 3 gallons
B.  gallon
C.  gallon
D. 10 gallons

Mathematics

Provide an appropriate response.Solve the equation  for x. If y is positive and b is positive, what, if anything, can you determine about the signs of the solutions? Explain your reasoning.

What will be an ideal response?

Mathematics