During the last ice age the sea level was it is today. a) unknown, unlike b) much lower than eliminate c) much higher than d) about the same as

Anyone know? will mark brainliest if correct!

Select a graph that have an equation with a < 0

John used linear combination to solve the system of equations shown. he did so by multiplying the first equation by -3 and the second equation by another number to eliminate the x-terms. what number did jonas multiply the second equation by? 4x-6y=23x+5y=11