Answer:
A constant is a number that stays the same. A variable is number that doesn't remain the same.
x = 60°
180 - 120 = 60
n is less than or equal to: 10
Step-by-step explanation:
10n+20=120
subtract 20
10n=100
divide by 10
n=10
-15x + 30
-3(5x -10)