the temperature has been dropping 2 1/2 degrees every hour and the current temperature is -15. How many hours ago was the temperature 0?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?

Renee hiked for 6 3 /4 miles. after resting, renee hiked back along the same route for 5 1 /4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.