Answer: 3 hours and 54 minutes
Step-by-step explanation:
Answer: d) -5, -40, -640
<u>Step-by-step explanation:</u>
Answer:3z2-7z
Step-by-step explanation: First, subtract the 5z2 from the 8z2. Then, combine the last two like terms which are -3z and -4z.
Lastly, combine everything in biggest to lowest exponent. Which is z2 and lowest is z.