What is the solution of the equation 4.6+1.2x=54.6+0.8x

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

There were 816 people at a concert when a band started to play. after each song, only half the people stayed to hear the next song. how many people were left at the concert after x songs? write a function to represent this scenario.

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12