in a set of geometric figures, the mass of 4 pyramids and 2 cubes is 40 grams and the mass of 6 pyramids and 4 cubes is 68 grams

Trapezoid abcd is an isosceles trapezoid, ad||cb, a diagonal line runs from angle d to b. angle cdb is 50 degrees and angle dab is 70 degrees, find the remaining angle degrees for angles bda, dba, bcd, and dcb.

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?