Solving quadrilaterals hw

solve for x. each figure is a parallelogram

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

What is the graph of the absolute value equation ? y=|x|-5

Ben frank is an electrician who installs lighting fixtures. he charges (in dollars) his clients 15h+40f15h+40f where hh is the number of hours worked and ff is the number of fixtures installed. how much does ben frank charge when he works 77 hours and installs 99 fixtures?