Which goes with which

Lucy is a dress maker. she sews \dfrac47 7 4 of a dress in \dfrac34 4 3 hour. lucy sews at a constant rate. at this rate, how many dresses does lucy sew in one hour? include fractions of dresses if applicable

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2