Answer:
-18
Step-by-step explanation:
Successor of -19 = - 19 + 1 = - 18
Answer: D, the fourth option.
Step-by-step explanation:
If S and Y are complementary, that means they add to 90.
So S + Y = 90
And S = 2Y - 45
Use substitution to plug 2Y - 45 in for S.
(2Y - 45) + Y = 90
3Y - 45 = 90
3Y = 135
Y = 45
If Y equals 45, then S also equals 45 since S+Y=90.