PLEASE HELP!
1. During an ice age, Earth’s sea level _____.
A. gets lower
B. rises and lowers cyclically
C. does not change
D. gets higher
A. gets lower
Add or subtract.
5. (m ^ 2 - m - 4) + (m - 5) (1 point)
m ^ 2 - 2m + 9
m ^ 2 + 2m - 9
m ^ 2 - 2m - 9
m ^ 2 - 9
m^2 - m - 4 + m - 5
= m^2 - m + m - 4 - 5
= m^2 - 9
Therefore, the answer is m^2 - 9.