4. What is the sum of the place values of the tens place digit and the thousands place digit of the number 44444?​

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read