Based on the areas of the squares, determine whether the triangle shown is a right triangle. Please help need it done in 20 minutes

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

If angle 2=3x +1 and angle 3=2x +4what is angle 2

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)