Whats g(-1) on the quadratic function

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2