All irrational numbers are real numbers. ☺
Answer:

Step-by-step explanation:
cos O = adjacent / hypotenuse
cos O = 12/13
I hope I helped you^_^
Answer:
75 each month
Step-by-step explanation:
578-128=450
450/6=75
Answer: x > 20
Step-by-step explanation:
x + 10 > 30
-10 -10
x > 20