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

With #! i’ve tried to figure it out but i can’t.

Dylan and dusty plan to take weekly surfing lessons together. if the 2-hour lessons are $20 per person and they plan to spend $100 each on new surfboards, what is the maximum number of lessons the two can take if the total amount spent for lessons and surfboards is at most $480?

Kayla and alberto are selling fruit for a school fundraiser. customers can buy small boxes of grapefruit and large boxes of grapefruit. kayla sold 3 small boxes of grapefruit and 1 large box of grapefruit for a total of $65. alberto sold 1 small box of grapefruit and 1 large box of grapefruit for a total of $55. what is the cost each of one small box of grapefruit and one large box of grapefruit?