Add the following amounts: $112,774.50; $49,774.50; $37,622.50; $1,338.00; $1,200.00; $9,984.00; $7,663.50. what is the sum?

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

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

The anwser cause i do not understand just plez