Solve the problem.A contractor finds that it takes Sam Tockett 9 hours to construct a wall of a certain size. It takes Jim Lowell 6 hours to construct the same wall. How long would it take if they worked together?
A. 3
hours
B. 15 hours
C. 
of an hour
D. 1 hour
Answer: A
You might also like to view...
Solve the problem.The lifespan for a pair of walking shoes is normally distributed with a mean of 
steps and standard deviation of 
steps. If a manufacture produces 6000 pairs of these shoes, how many can be expected to last for at least 732,800 steps?
A. ? 1391 pairs B. ? 1313 pairs C. ? 1205 pairs D. ? 1271 pairs
Graph the hyperbola. Give the coordinates of the center as well as the values of a and b.
- 
= 1
A. center (0, 0), a = 8, b = 3
B. center (0, 0), a = 3, b = 8
C. center (0, 0), a = 8, b = 3
D. center (0, 0), a = 3, b = 8
Does the picture below illustrate the line of symmetry? Answer yes or no.
?
What will be an ideal response?
Answer the question.2x - 7y = -175x + 3y = 19If your friend was going to solve this system of equations by first eliminating y, what general suggestions would you make so your friend could start on this in a systematic way?
What will be an ideal response?