I believe I already answered this question... did I get it wrong?
190mph
I used speed calculator with advanced mode
HTTP://www.omnicalculator.com/everyday-life/speed
Answer:
C. 60
Step-by-step explanation:
x + 10 = 70
Subtract 10 from both sides
x + 10 - 10 = 70 -10
Simplifying
x = 60