A good estimate of the age of the Earth is 4.54 × 10 9 years. What is this number written in standard form?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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 is the area of a triangle with vertices at (-3 3) (-3,2) and (1,2)?