Add more variety to this text by rewriting it using at least two dependent clauses. The stranger arrives in a wagon. Elisa is not expecting him. He asks about
sharpening tools. Elisa doesn't need anything sharpened. She has some
damaged pots, though. He could fix those.

The sentence needs a descriptor of exactly "what" will happen at gurley and marina. in this case, it is the light at the intersection turning green. in this case, the sentence could be rewritten as "the light at the intersection of gurley and montezuma will turn green exactly three seconds after the light at the intersection of gurley and marina."

Rational solutions. often the  solutions  to quadratic equations are  rational  numbers, which are integers or fractions. the requirement for the  solution  to be an integer or fraction is that √(b2  − 4ac) is a whole number.