Answer:
99 degrees
Step-by-step explanation:
81+a=180, so
180-81=99
a=99
#12. When x = 4, y = 5(4) - 1 = 20 - 1 = 19
when x = 12, y = 5(12) - 1 = 60 - 1 = 59
when x = 0, y = 5(0) - 1 = 0 - 1 = -1
when x = 0.5, y = 5(0.5) - 1 = 2.5 - 1 = 1.5
Step-by-step explanation:
=>a+6a=90-12
=>7a=78
=>a=11,14
