Match the coordinates with the quadrants they lie in. || Quadrant I || Quadrant II || Quadrant III || Quadrant IV ||

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles.

1-for what value of x is line a parallel to line b 2-for what value of x is line a parallel to line b

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.