Katherine is landscaping her home with juniper trees and pansies. she wants to arrange 15 pansies around each of 8 trees. each tree costs $20.75 and a six-pack of pansies costs $2.50. explain how to write an expression to find katherine’s final cost.

Let
X> number of pansies
y> number of trees

we know that
x=15*8> x=120 pansies
y=8 trees

cost of each trees is> $20.75
cost of each pansies is> $2.50/6> $5/12

[expression to find Katherine’s final cost]=[cost trees]+[cost pansies]
[cost trees]=y*$20.75
[cost pansies]=x*($5/12)   

[expression to find Katherine’s final cost]=y*($20.75)+x*($5/12)
[expression to find Katherine’s final cost]=8*($20.75)+120*($5/12)

[expression to find Katherine’s final cost]=$166+$50
[expression to find Katherine’s final cost]=$216

the answer is 
[expression to find Katherine’s final cost]=y*($20.75)+x*($5/12)
[expression to find Katherine’s final cost]=8*($20.75)+120*($5/12)

Katherine’s final cost is $216