Nick is a plumber who charges $65 for a service call and $55 per hour of work fixing a plumbing problem. Which expression models this situation?

In the proof of the triangle angle sum theorem, you must draw an auxiliary line. which construction must you use to draw this line?

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0