What does the word combine mean in math?

How long is 21 working days? How many times does 4 go into 16 and 36? How many Kg can you fit in a container that says hold 240 liters? What do positive and negative values mean? What is the surface area of a cylinder with a radius of 15in and a height of 34in? What is 80KMH in miles per hour? What is the difference between a zero angle and a straight angle? Why delivery is more important than words? What are the order from smallest to greatest with these number 1.54 22.39 15.471 2.095? Which state is divided into two large partswith one part not attached to the other part? What is the radial velocity 55 Cancri e 0 1 2 what is it mean last digit birthday emans? Is a octagon symmetrical? What is the density of volume of 3 cubic cm and mass of 10.56 g? Is 7 over 3 greater than 2? What did the children use to write with? 200 cm is equals to how many meters? How do you write the number 25 in Chinese? What does estimate each sm or difference mean? Can you give me a sentence using the word cube? Is grams smaller than kg?