The answer is a because it is the only one that decreases without ever increasing
All the angles should add up to 360°.
8x+10x+9+21x-12+90=360°
Group like terms together.
So,8x+10x+21x+9+90-12=360
39x+87=360
39x=360-87
39x=273
x=7
The answer is C because its the right choice
Answer:
Step-by-step explanation:
3:5 and 50/100
Are both less than 8:10
16/20 is the same as 8:10 and 13/15 is more than