It would be 12 since the middle numbers are 11 and 13 you take the number in the middle
90x^2+15x-30 (hope this helps)
Answer:
1a- Alternate Exterior Angles
1b- Alternate Interior Angles
1c-Alternate Exterior Angles
1d-Alternate Interior Angles
1e-Alternate Exterior Angles
1f-Alternate Interior Angles
2a-None
2b-None
2c-Alternate Exterior Angles
2d-None
2e-Alternate Interior Angles
2f-None
2g-None
2h-None
2i-None
2j-None