Which of the following represent the area of a rectangle whose length is 5x-3 with is x +7
a. 5x^2-21
b.5x^2+9x-21
c.5x^2+32x-21
d.5x^2-32x-21

Just tell me how to set up the equation.

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.

What are the solutions of the equation? z^2 + 11z + 24 = 0 a. 8, -3 b. 8, 3 c. -8, -3 d. -8, 3