Which equation demonstrates the distributive property? a) 14 + 77 = 91 b)14 x 77 = 77 x 14 c)14 + 77 = 7(2 + 11) d)(2 + 11)7 = 7(2 + 11)

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

We just started the introduction into circles and i have no idea how to do this.

Prove sin2a + cos2a - 1 / sin2a + cos2a + 1 = 1 - tana / 1 + cota