Answer:
hour
Step-by-step explanation:
C is correct because both are the same numbers but they are different by significant figures.
Alright, let's solve the second one because why not:

Let's then work on getting x by itself:


And that's your answer!
Answer:
divide the equation by 5
Step-by-step explanation:
all the components are factors of 5 so if we divide by 5, then we get as x² - 2x = -1