Find two decimals that are equivalent to (4×10)+(7×1\100

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.