What is true about the solutions of a quadratic equation when the radicand in the quadratic formula is negative? no real solutions two identical rational solutions two different rational solutions two irrational solutions

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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?

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.