triangular field having the length of sides are 42m, 34m and 20m respectively. find the area of the field (need this answ with full explanation)

anyone? find the second, fifth, and ninth terms of a sequence where the first term is 65 and the common difference is -7. 72, 93, 121 72, 79, 86 58, 37, 9 58, 51, 44

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

What are the solutions of the equation? 5z^2 + 9z - 2 = 0 a. 1, -2 b. 1, 2 c. 1/5, -2 d. 1/5, 2