E.5 hours
All you have to do is subtract 85 from 510 till you have 0
Answer:
x = √11
Step-by-step explanation:
2x² - 1 = 21
add 1 to both sides
2x² - 1 + 1 = 21 + 1
simplify
2x² = 22
x² = 22 / 2
x = √11
Answer: 12 : 14 18 : 21 24 : 28 30 : 35
Step-by-step explanation:
hope these is the right answer to your question