If point e is the midpoint of segment ac and point d is the midpoint of segment bc, which expression represents the value of s?
triangle cab, point e is on segment ac between points a and c and point d is on segment bc between points b and c, creating segment ed, ce equals p, ea equals r, cd equals q, db equals t, ed equals s, and ab equals u
s equals p over q
s = one half u
s equals q over p
s = 2u

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?