Find all solutions of tanx - sqrt 1 - 2tan^2 x = 0.
a. 60° + n360°, 120° + n360°
b. 30° + n360°, 210° + n360°
C. 30° + n360º, 150° + n360°
d. 60° + n360°, 300° + n360°

Given abcd ac=38 and ae=3x+4 find the value of x

The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years