Answer:
B. -3
your question isn't clear
8:2 can be simplified to 4:1. (:
Answer:13 hours
Step-by-step explanation: remember you are averaging so you add the two numbers and divide by the number of numbers, 2. So, 15+11=26, 16 divided by 2=13
Answer:
Step-by-step explanation:
Step-by-step explanation:

multiply both sides by a - r

divide both sides by s

subtract a from both sides

invert the signs
