Answer:
x = -0.95
Step-by-step explanation:
2e^-x+1 -5 = 9
2e^-x+1 = 9+5 = 14
e^-x+1 = 14/2 = 7
e^-x+1 =7
-x+1 = In 7 = 1.95
-x+1 = 1.95
x = 1 - 1.95 = -0.95
B) there is no solution
14.4
sin x = 24/30
x = sin^-1 (24/30) = 53.13
sin 53.13 = x/18
x = sin 53.13 x 18 = 14.4