Please help. Trig: Laws of Cosines
If a rhombus whose side measures 14 and the smaller angle is 80*, find the length of the larger diagonal, to the nearest tenth.

Asquare has a perimeter of sixteen centimeters. what is the length of each of its sides? a. 8 cm c. 9 cm b. 4 cm d. 10 cm select the best answer from the choices

What is the range of the function? f(x)=-2|x+1|? a. all real numbers. b. all real numbers less than or equal to 0. c. all real numbers less than or equal to 1. d. all real numbers greater than or equal to 1

Sole the equation 6n + 9 = -3n - 21 - 6 for n