Answer: 20 irises 80 tulips
Step-by-step explanation:
Set an equation to be
i(irises) + t(tulips) = 100
t = 4i
Substitute t into an equation
i + 4i = 100
Solve equation
i + 4i = 100
5i = 100
i = 100/5
i = 20
Then substitute i into t equation
t = 4i
t = 4(20) = 80