find the volume of the solid that lies below paraboloid z=4-x^2-y^2, above the xy-plane and inside the cylinder (x-1)^2 + y^2 =1

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

I’m really confused and need your assist me with this question i’ve never been taught