Consider this quadratic equation. x2 + 1 = 2x – 3 Which expression correctly sets up the quadratic formula?

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

How to do this , and can some one explain

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.