Harini

The temperature on a certain morning is -11℃ at 5 a. m. If the temperature drops 3 degrees at 6 a.m. and rises 5 degrees at 8 a.m. and again drops 3 degrees at 9 a.m. What is the temperature at 9 a.m.?

Area = 1/2(a+b)h = 1/2(6+5)4 = 1/2(11)4 = (11/2)4 = 22

(2/3)^(n-1) * 1/3 = 16/243 (2/3)^(n-1) = 16/81 2^(n-1)/3^(n-1) = 2^4/3^4 n-1 = 4 n = 5

3(x + 1)(x + 7) - (2x + 5)(2x + 5) = 3(x² + 8x + 7)- (4x²+ 20x + 25) = 3x² + 24x + 21- 4x²- 20x- 25 = -x² + 4x - 4 = -1(x - 2)² A squared number is always positive, but when you multiply it with a negative number, it is always negative, never positive. ^T...