Answer:
Step-by-step explanation:
Multiply the first equation by -1
-3x-y=-4
2x+y=5
Add them up
-x=1
So x=-1
And y=7
So the first option is correct
Answer: 16 posters
Step-by-step explanation:
Monday - Had owned 16 posters
Tuesday - Bought 4 posters, adding up to 20
Wednesday - Half of the posters were destroyed, half of 20 is 10
Thursday - 10 posters remained.
The volume would be <span>15927.87
so
</span>V ≈ 15927.87to be sure with my answer.
44
16
28
32
i think this is the answer
