Z=kx/y
7.9=k11/14
Cross multiply
K11=7.9x14
K =7.9x14/11
K=10.1
........
Z= kx15/22
Z=10.1x15/12
Z=12.625
Two mechanics work on a car . The first mechanic worked 10 hours and the second mechanic worked for 15 hours. Together they char
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