Mrs. grijalva hired a landscaping company to landscape her back yard. the company has a standing policy to plant 3 bushes for every tree planted. the company charges $75 for each tree planted and $20 for each bush. mrs. grijalva was billed for $810 after the planting was complete. how many bushes did the company plant in mrs. grijalva’s back yard?
a.
2
b.
6
c.
18
d.
54