Find the LCD (least common denominator) of the set of fractions. Do not combine the fractions; only find the LCD. 13/23
and
56/140

Barbara's piano instructors house is 7 1/8 miles from her house. after biking for 1 3/4 miles she stops to rest how much longer does she need to bike to reach her instructor's house

How to solve a simultaneous equation involved with fractions?

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?