Start with an equation.
Nine less... so -9
3 times a number = 3x
Greater than 40 is >40
So put together is 3x-9>40
When solving I imaging the greater than sign as an equal sign. Less confusing.
3x-9=40
3x=49
x>49/3
Answer:
The correct answer is B (The universe was hotter previously than it is now
50 miles / 4 hours = 12.5 miles per hour
Answer: 12.5