SOLUTION: Mark lays a slab of concrete in 6 hours. tony lays the same size slab in 2 hours. if both work on the job together and the cost of labor is $42 per hour, decide what the labor esti

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Question 970929: Mark lays a slab of concrete in 6 hours. tony lays the same size slab in 2 hours. if both work on the job together and the cost of labor is $42 per hour, decide what the labor estimate should be
Answer by josgarithmetic(39630) About Me  (Show Source):
You can put this solution on YOUR website!
(1/6+1/2)(JOBS/HOUR)(1/43)(HOUR/DOLLARS)=howmany(JOBS/DOLLARS)




%282%2F3%29%281%2F42%29%28jobs%2Fdollar%29

1%2F%283%2A21%29

1%2F63
63%2Adollars, to do the one job.