Please help!! On a timer!

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

This week, conrad will work 1 3/4 times longer than last week. giovanni will work 1 1/3 times longer than last week. sally will work 2/3 the number of hours she worked last week. match each employee's name to the number of hours he or she will work this week

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10