Casey walked 2.1 miles to the grocery store. She then walked 0.5 miles to the post office and 0.8 miles to work. How far did she walk in total? Convert your answer into kilometers.

Mrs. morton has a special reward system for her class. when all her students behave well, she rewards them by putting 3 marbles into a marble jar. when the jar has 100 or more marbles, the students have a party. right now, the the jar has 24 marbles. how could mrs. morton reward the class in order for the students to have a party?

You paid 28.00 for 8 gallons of gasoline. how much would you pay for 15 gallons of gasoline?

If f(x)= sqrt4x+9+2, which inequality can be used to find the domain of f(x)?