Answer:
the amount of unused space is 1080-320, or 760
Step-by-step explanation:
3r + 4t = 80
Roses cost $3 each, tulips cost $4 each
Subtract the like terms:
6x^2 - 2x^2 = 4x^2
3x - -4x = 3x+4x = 7x
1 - 5 = -4
Now combine them to get the final answer:
4x^2 + 7x - 4
not a clue luv sorry xxxx