Answer:
3h+18°+15h= 180°(straight angle)
=>18h+18= 180°
=>18h= 180-18° = 162°
=>h= 162°/18= 9
option B
h=9
Step-by-step explanation:
(3h+18)° + (15h)° =180 because they form straight agle together
Solve for h:
3h+18 + 15h =180
18h=180-18
h= 162/18
