What is 1 whole and 1/4 minus 3/8

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

To prove that angle def = angle dgf by sas, what additional information is needed? def congruent to dgf dfe congruent to dfg de congruent to dg dg congruent to gf

How do i find the missing angle measure in a polygon