Answer:
number 12 is
2 2
4y(2y +3y - 5) - 3(2y + 3y - 5)
3 2 2
=8y + 12y - 20y - 6y - 9y + 15
3 2
=8y + 6y - 29y + 15
Step-by-step explanation:
It might be 70 because 5m has the volume of 50 m so maybe 7m in volume is 70?