Emma sold 18 cups of lemonade in 4 hours. the next day was warmer and she sold twice as much lemonade in the same amount of time. what was the average rate of selling lemonade on the second day?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Jenny earned a 77 on her most recent test jenny score is no less then 5 points greater then 4/5 of terrance’s score if t represents terrance score which inequality represents the situation

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?