Two neighbors pot plants from the same store to improved their yards.James spend $77 and 7 dailies and 8 shrubs. Liz spend $140 on 14 dailies and 14 shrubs. What is the cost of one daylily and one shurb?
Let
x ------> the cost of one daylily
y ------> the cost of one shurb
we have that
7x+8y=77 -------> equation A
14x+14y=140 -----> equation B
solve tthe system of equations
Solve by graphing
using a graphing tool
see the attached figure
please wait a minute
the solution is the point (3,7)
that means
the cost of one daylily is $3
the cost of one shurb is $7
