Evaluate each expression for a = 20 and b = 5

a\b a-b

ab a+b

Hi my sisters and brothers can tell me the answer because i don’t understand the question

Sara can take no more than 22 pounds of luggage on a trip. her suitcase weighs 112 ounces. how many more pounds can she pack without going over the limit?

Teams of 4 are competing in a 1/4 mile relay race. each runner must run the same exact distance. what is the distance each teammate runs?