She can Hang up 4 posters. Because Taylor only has 16 tacks.
16/4=4
X + y = 1.....multiply by -2
2x - 3y = -30
-----------------
-2x - 2y = -2 (result of multiplying by -2)
2x - 3y = -30
----------------add
-5y = -32
y = -32/-5
y = 32/5 or 6.4 <===
I think all of them are true
5. area = 452.4
6. area = 56.8
Answer:
6
Step-by-step explanation: