Apair of pants with a marked price of $35.00 has a discount of 20%. how much is the discount? can someone me learn to do problems like this ?

What is the domain and range of each function 1. x (3, 5, 7, 8, 11) y ( 6, 7, 7, 9, 14) 2. x (-3, -1, 2, 5, 7) y (9, 5, 4, -5, -7)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?