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

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) (Show Source): You can put this solution on YOUR website!
(1/6+1/2)(JOBS/HOUR)(1/43)(HOUR/DOLLARS)=howmany(JOBS/DOLLARS)

, to do the one job.

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