Answer:
6 hours
Step-by-step explanation:
jim can plant 8 trees in 18 hours. kinda can plant 8 trees in 9 hours. how long will it take him and linda working together to plant 8 trees?
jim speed is 8/18 trees/hour
linda speed is 8/9 trees/hour
combined speed [tex]\frac{8}{18} + \frac{8}{9} = \frac{8}{18} + \frac{16}{18} = \frac{24}{18}[/tex] [tex]= \frac{12}{9}[/tex] trees/hour
[tex]\frac{8}{x} = \frac{12}{9}[/tex]
9*8 = 12x
72 = 12x
x = 72/12
x = 6
