Please help i am desperate! Write an explicit formula for the nth term of the arithmetic sequence –1, –3, –5, –7, … Enter your formula in the form: an=d(n−1)+a1

Franco wants to double the volume of the cone. what should he do?

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

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.