Which shows the equation below written in the form ax^2+ bx + c = 0? x+ 9 = 2(x - 1)2 a. 2x^2-5x+11 = 0 b. 2x^2-3x+11 = 0 c. 2x^2-3x - 7 = 0 d. 2x^2 -5x - 7 = 0

Answer d; a supplementary angle = 180°, so if that angle = 150°, y would = 30°.

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.