Maria and Jake and played the integer Card game, where players find the sum of their cards to see who has the highest score. Maria has four cards : -4, -7, 11, and 3. What is the total score (sum) of Maria's hand?

Mat bought a phone for $100. he has to pay $30 per mouth. if he has paid $640 in total, how many mouth has he had the phone?

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

Three people are traveling and need to exchange the currency of their native country for the currency of the country they are visiting. drag each exchange to the category that shows the ratio of currencies in that exchange.