Answer:
Cost of one daylily = $3
Cost of one bunch of ornamental grass = $8
Step-by-step explanation:
Define the variables:
- Let d = cost of one daylily (in dollars)
- Let g = cost of one bunch of ornamental grass (in dollars)
Given information:
- $118 = 2 daylilies and 14 bunches of ornamental grass
- $98 = 14 daylilies and 7 bunches of ornamental grass
Create a system of equations with the given information and defined variables:
[tex]\begin{cases}2d+14g=118\\14d+7g=98 \end{cases}[/tex]
Multiply the second equation by 2:
[tex]\implies 2(14d+7g)=2(98)[/tex]
[tex]\implies 28d+14g=196[/tex]
Subtract the first equation from this equation to eliminate the variable g:
[tex]\begin{array}{r r r}28d & +14g = & 196\\- \quad \quad2d & +14g = & 118\\\cline{1-3}26d & = & 78\end{array}[/tex]
Solve for d:
[tex]\implies 26d=78[/tex]
[tex]\implies d=3[/tex]
Substitute the found value of d into one of the equations and solve for g:
[tex]\implies 2d+14g=118[/tex]
[tex]\implies 2(3)+14g=118[/tex]
[tex]\implies 6+14g=118[/tex]
[tex]\implies 14g=112[/tex]
[tex]\implies g=8[/tex]
Therefore, the cost of one of each plant is:
- Cost of one daylily = $3
- Cost of one bunch of ornamental grass = $8
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