The sum of two numbers is 47. if their difference is 21, find the smaller number the possible answers i have are 13, 16, $13.75, 34, or 31

Which number produces a rationale number when multiplied by 1/5

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =